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Program to Compute real roots of a quadratic expression

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Problem Description Program to find the real roots of a quadratic equation as given below ax 2 + bx + c is a quadratic equation, we need to find the real root for these type of expressions, the formula to find the root is as given below Where Discriminant  of a Quadratic represented by D = b 2  – 4ac, which reveals the type of roots as per the following conditions If D >0, the roots would be real If D = 0, then both roots would be equal If D < 0, the roots would be imaginary. C Program #include<stdio.h> #include<math.h> int main() { int a,b,c; float d,r1,r2; printf("Enter 3 constant a,b,c: "); scanf("%d%d%d",&a,&b,&c); d = b * b - 4 * a * c; if (d < 0) { printf("Roots are imagenary"); }else { r1 = (b + sqrt(d)) / (2 * a); r2 = (b - sqrt(d)) / (2 * a); printf("Root1 = %.2f\nRoot2 = %.2f",r1,r2); } return 0; } C++ program #include<iostream> #include<math.
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Program to Compute Change

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Problem Explained Input an amount from a user as a decimal number, such as 11.56 Conver the amount (e.g, 11.56) as (1156 cents) Calculate the change as per the following rules... 1 Doller 100 Cents 1 Quarter 25 Cents 1 Dime 10 Cents 1 Nickel 5 Cents 1 Pannie 1 Cent C Programming #include<stdio.h> int main() { float amount; int dollars,quarters,dimes,nickels,cents,pennies; printf("Enter the amount: "); scanf("%f",&amount); cents = (int)(amount * 100); dollars = cents / 100; cents = cents % 100; quarters = cents / 25; cents = cents % 25; dimes = cents / 10; cents = cents % 10; nickels = cents / 5; pennies = cents % 5; printf("Your amount %.2f consists of \n",amount); printf("%d dollers\n",dollars); printf("%d quarters\n",quarters); printf("%d dimes\n",dimes); printf("%d nickles\n",
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Program to convert time from seconds to hours, minutes and seconds

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C Programming #include<stdio.h> int main( ) {              int seconds;              int hours,minutes,remainingSeconds;              printf("Enter the time in seconds: ");              scanf("%d",&seconds);                  hours = seconds / 3600;              remainingSeconds = seconds % 3600;              minutes = remainingSeconds / 60;              remainingSeconds = remainingSeconds % 60;                  printf("%d seconds is %d hours %d minutes %d seconds",seconds,hours,minutes,remainingSeconds);                  return 0; } C++ Programming #include<iostream> using namespace std; int main( ) {             int seconds;                cout << "Enter the time in seconds: ";            cin >> seconds;                int remainingSeconds;                int hours = seconds / 3600;            remainingSeconds = seconds % 3600;            int minutes = remainingSeconds / 60
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Area of Circle

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C Programming #include<stdio.h> #define PI 3.14156 int main() {     float r,area;         printf("Enter the radius: ");     scanf("%f",&r);         area = PI * r * r;         printf("Simple interest = %.2f",area);     return 0; } C++ Programming #include<iostream> #define PI 3.14156 using namespace std int main() {     float r,area;         cout<<"Enter the radius: ";     cin>>r;         area = PI * r * r;         cout << "Area of circle = "<<area<<endl;         return 0; } Java import java.util.Scanner; class CircleArea {     public static void main(String args[]) {         final float PI = 3.14156f;                 float r,area;                 Scanner sc = new Scanner(System.in);         System.out.print("Enter the radius: ");         r = sc.nextFloat();                 area = PI * r * r;                 System.out.println(&
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Swap two numbers

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C Programming #include<stdio.h> int main() { int a,b,t; printf("Enter any two numbers: "); scanf("%d%d",&a,&b); t = a; a = b; b = t; printf("a = %d \t b = %d",a,b); } C++ Programming #include<iostream> using namespace std; int main() { int a,b,t; cout << "Enter any two numbers: "; cin >> a >> b; t = a; a = b; b = t; cout << a << "\t" << b; return 0; } Java import java.util.Scanner; class Swap { public static void main(String args[]) { int a,b,t; Scanner sc = new Scanner(System.in); System.out.print("Enter any two numbers: "); a = sc.nextInt(); b = sc.nextInt(); t = a; a = b; b = t; System.out.println("a = "+a+" \t b = "+b); } } Go Lang package main import "fmt" func main() { var a,b,t int32 fmt.Print("Enter any two numbers: &q
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Calculate simple interest

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C Programming #include<stdio.h> int main() { int p,t; float r,si; printf("Enter principal,time and rate: "); scanf("%d%d%f",&p,&t,&r); si = p * t * r / 100; printf("Simple Interest = %.2f",si); return 0; } C++ Programming #include<iostream> using namespace std; int main() { int p,t; float r; cout << "Enter principal, time and rate: "; cin >> p >> t >> r; float si = p * t * r / 100; printf("Simple Interest = %.2f",si); return 0; } Java Programming import java.util.Scanner; class SimpleInterest { public static void main(String args[]) { int p,t; float r,si; Scanner sc = new Scanner(System.in); System.out.print("Enter principal, time and rate: "); p = sc.nextInt(); t =
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Sum of two numbers

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C Programming #include<stdio.h> int main() { int a,b,sum; printf("Enter any two numbers: "); scanf("%d%d",&a,&b); sum = a + b; printf("Total = %d",sum); return 0; } C++ Programming #include<iostream> using namespace std; int main() { int a,b; cout << "Enter any two numbers: "; cin >> a >> b; int sum = a + b; cout<<"Total = "<<sum; return 0; } Java import java.util.Scanner; class Sum { public static void main(String args[]) { int a,b; Scanner sc = new Scanner(System.in); System.out.print("Enter any two numbers: "); a = sc.nextInt(); b = sc.nextInt(); int sum = a + b; System.out.print("Total = "+sum); } } Go Lang
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Say Hello World

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C programming #include<stdio.h> int main() { printf("Hello World"); return 0; } C++ Programming #include<iostream> using namespace std; int main() { cout << "Hello World"; return 0; }  Java Programming class HelloWorld { public static void main(String args[]) { System.out.println("Hello, World"); } }  Go Lang package main import "fmt" func main() { fmt.Print("Hello World") } php <?php echo "Hello world"; ?>  
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Printing in C programming

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Printing in C In C for printing purpose, We Use A Function Called printf( ) . A function is a small program used to perform a specific task. The function receives some input known as an argument and produces some output called return value. Functions are always suffixed with parenthesis ( ). Syntax of printf( ) printf("Control String",[List or Variable]); Note: Control string is a sequence of characters which you want to print. ([ ]) square brackets around the list or variable represent that it is optimal. Example Of printf( ) printf("hello"); //Print hello int a=5,b=6; printf("a=%d b=%d",a,b); //print the value of a and b. int a=5,b=6; //Varialbe Declaration printf("%d",a+b); //Print 11. Note: In printf( ) expression can be written .The example is given above. The first program, Say Hello World in C programming /*program to print the "Hello world"*/ #include<stdio.h> int main() { printf(
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Arrays in Go lang

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What is Array An array is the collection of similar type of elements. An array is the collection of fixed length. Array elements are stored in contiguous memory locations. All the array elements share the common name, but each element is uniquely identified their index or subscript, so the array is also called a subscript variable. Array index always starts with 0. Creating an array var arr [5]int Note:  In the above program snippet, arr is an array of 5 integers. By default, all the array elements are initialized with a default value. Default Values Data Type Default Value Int(s) 0 Float(s) 0.0 bool(s) false Objects nil Note: Following example demonstrate the default values for array elements. Example-1 package main import "fmt" func main() { var arr1 [5]int var arr2 [5]float32 var arr3 [5]string var arr4 [5]bool fmt.Pr
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Decision Making in Go lang

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Introduction to decision making Sometimes we need to introduce a power in our program, that our program should automatically make the decision. For example:  if the temperature of the day is more than 20 degree then it's hot otherwise it's cool. To introduce this kind of power in our program, we use decision making statements as the list below... if-else statements nested if-else statements else-if ladder switch/case-control statement Let's create a program to check whether a number is even or odd. Program to check a number is even or odd in Go lang. package main import "fmt" func main() { var n int32 fmt.Print("Enter any number:") fmt.Scan(&n) if n % 2 == 0 { fmt.Println(n,"is even") } else { fmt.Println(n,"is odd") } } Output: Enter any number:55 55 is odd  Explanation: A number is even if it is divisible by 2 otherwise odd. So to che
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History of C programming language

History of C C is a general-purpose programming language initially developed by the  Dennis Ritchie  between 1969 to 1973 at AT & T (American Telegraph and telecommunication) Bell Labs. It is named  C  because its features are derived from the earlier language called  B  which is developed by the  Ken Thomson . According to Ken Thomson  B  was the stripped-down version of BCPL (Basic combined programming Language). The origin of c is closely tied up with the Unix operating system development. In 1973 with the addition of  struct  type the c becomes powerful enough that the Unix operating system was designed in C. This was one of the first operating system kernels implemented in a language other than assembly. In 1978, Brian Kernighan and Dennis Ritchie published the first edition of  The C Programming Language. This book, known to C programmers as "K&R", served for many years as an informal specification of the language. The vers
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Looping in go lang

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Loop is a structure with the block of statements can be repeated for the finite number of times.  Till Now we have learned the programs that execute sequentially, Now we are going to learn control structures which change the normal flow of the program and helps you to create more meaningful and compact program structure. To understand more, suppose we want to print from 1 to 10 number counting, each number should be printed in the new line. Program to print numbers from 1 to 10 package main import "fmt" func main( ) { fmt.Println(1) fmt.Println(2) fmt.Println(3) fmt.Println(4) fmt.Println(5) fmt.Println(6) fmt.Println(7) fmt.Println(8) fmt.Println(9) fmt.Println(10) } Another compact way to create this program use loop. The following example creates this program using the loop. Program package main import "fmt" func main() { i := 1 //initialization for i <
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Convert Temperature from Fahrenheit to centigrade

The formula to convert temperature from Fahrenheit to Centigrade is as below... C = ( F - 32 ) * 5 / 9 where C and F are temperature in Centigrade and Fahrenheit in respectively. package main import "fmt" func main() { var f float32 fmt.Print("Enter the temperature in fahrenheit: ") fmt.Scan(&f) c := ( f - 32 ) * 5 / 9 fmt.Printf("Temprature in centigrade: %.2f",c) }
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Constant in Go lang

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Constant in go lang Constants are basically variable which value can't change once created. Constants are created in the same way as variables, the only difference is that to create a variable use var keyword and to create constant use const keyword. Constant Example-1 package main import "fmt" func main() { const playerName string = "Rahul" fmt.Println(playerName) //playerName = "Micky" //compile time error, cannot assign to playerName. } Constant Example-2 package main import "fmt" func main() { const METER_PER_FEET = 0.3048 var feet,meter float32 fmt.Print("Enter value in feet...") fmt.Scan(&feet) meter = feet * METER_PER_FEET fmt.Printf("Meter %.2f",meter) }  Note: In the above example, METER_PER_FEET is a constant. It is suggested that constant name should be written in uppercase, each word separated by an unders
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String in golang

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Strings are sequence of characters with definite length and can be created by enclosing in double quotes "Hello Go" and back ticks `Hello Go`.  A string is a sequence of characters. Strings are the collection of individual bytes, where each character occupy single byte. Characters out of the ASCII characters (can say characters from other languages) occupy more than one byte. A string can be created by enclosing in double quotes "Hello Go" or backticks `Hello Go`. The difference between double quotes and backticks is that double quotes allow escape sequences like \n (newline) and \t (tab) and parses them but backticks don't. Example-1: package main import "fmt" func main( ) {         fmt.Println(len("Hello Go"))         fmt.Println("Hello Go"[1])         fmt.Println("Hello"+" "+"Go") } Output:  8 101 Hello Go   Output Explained: fmt.Println(len("Hello Go"))
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Inline V/S Block Level Element

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What is Element? An element is the combination of opening tag, closing tag and text between the opening and closing tag. The following figure helps you to understand, what is an element? Element in Html Types of Element in HTML Block level elements Inline elements Block level Element Block Level elements are those which always starts from a new line. Examples of block level elements All Headings (h1,  h2,  h3,  h4, h5, h6) Paragraphs Lists Inline Element Inline elements are those, which don’t change the line automatically. Examples of inline element Bold (<b>Bold</b>) Italic (<i>Italic</i>)  Underline (<i>Underline</i>) Links (<a>Links</a>) Watch the video
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Floating point Data types in Go lang

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As we have discussed, In our previous article Data types in go lang , In Go lang Numbers can be categorized into two broad categories. Integral Numbers Floating point Numbers We have already discussed integral numbers In this article we will discuss all floating point numbers. Floating point Numbers Floating point numbers are those which contains decimal places, for example (2.34 , -90.435 , 0.00007) Rules for floating point numbers  Floating point number can contain decimal places, For example (0.006, 2.45) Can be +ve and -ve. Floating point number can be written in two formats Fixed format , example (0.007) Exponent format , example (0.7 E -4) 0.7 E -4 is equivalent to 0.7 * 10 <sup>-4</sup> In 0.7 E -4, 0.7 (part before e) is called mantissa and -4 (part after E) is called exponent. Exponent format is used when a number is too large or too small to represent in decimal places. Floating point number can be of 32bits or 64bits in size in g
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Escape Sequence | Formatted Printing | Interview Questions

Escape sequence Escape sequence are some non-printable character that shows the effect while printing the output. The usage and example of escape sequence are given below. These are the combination of two characters backslash(\) and one more character but treated as a single character occupy only one byte as other characters. Escape Sequence Character Meaning Usage \a Bell alert Used to make a sound. \b backspace Used to move the cursor to the one character back. \n newline Used to change the line \r Carriage Return Used to move the cursor to the beginning of the current line. \" Double Quotes Used to print the double quotes \' Single Quotes Used to print the single quotes \f Form feed Used to change the page \t tab Used to print the tab Program to demonstrate the use of escape sequence #include<s
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Sum of two numbers

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C Programming #include<stdio.h> int main() { int a,b,sum; printf("Enter any two numbers: "); scanf("%d%d",&a,&b); sum = a + b; printf("Total = %d",sum); return 0; } C++ Programming #include<iostream> using namespace std; int main() { int a,b; cout << "Enter any two numbers: "; cin >> a >> b; int sum = a + b; cout<<"Total = "<<sum; return 0; } Java import java.util.Scanner; class Sum { public static void main(String args[]) { int a,b; Scanner sc = new Scanner(System.in); System.out.print("Enter any two numbers: "); a = sc.nextInt(); b = sc.nextInt(); int sum = a + b; System.out.print("Total = "+sum); } } Go Lang
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Operators in C Language| Part-4

Unary operators Unary operator are those which only require one operand(argument) to operate. + , - , ++, --, typecast and sizeof are some unary operators in C programming. +5, -5 are the example of +,- unary operators. which represents +ve and -ve values. Unary operators have high priority than binary operators, so unary operators are always evalutes first. Increment / Decrement operator ++, -- are called increment and decrement operators. Increment and decrement operators are available in two versions Prefix Postfix Difference b/w prefix and postfix Prefix Postfix int a = 5; ++a; printf("%d",a); // 6 int a = 5; a++; printf("%d",a); // 6 int a = 5,b; b = ++a; printf("%d %d",a,b);// 6 6 int a = 5,b; b = a++; printf("%d %d",a,b);//6 5 Example of increment and decrement operators Example-1: int a = 3, b = 4,c; c = ++a * ++b; printf("%d %d %d",a,b,c); /
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Printing in C programming

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Printing in C In C for printing purpose, We Use A Function Called printf( ) . A function is a small program used to perform a specific task. The function receives some input known as an argument and produces some output called return value. Functions are always suffixed with parenthesis ( ). Syntax of printf( ) printf("Control String",[List or Variable]); Note: Control string is a sequence of characters which you want to print. ([ ]) square brackets around the list or variable represent that it is optimal. Example Of printf( ) printf("hello"); //Print hello int a=5,b=6; printf("a=%d b=%d",a,b); //print the value of a and b. int a=5,b=6; //Varialbe Declaration printf("%d",a+b); //Print 11. Note: In printf( ) expression can be written .The example is given above. The first program, Say Hello World in C programming /*program to print the "Hello world"*/ #include<stdio.h> int main() { printf(
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Arrays in C Language

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Suppose you want to store the 10 numbers. The one choice is to create a 10 different variable but it is difficult when number of variable are increases. So the next solution that is more feasible is array. An array is the collection of various similar type elements stored in contiguous memory locations. All the array elements share the common name. To uniquely identify each element an index or subscript is associated with the element. so the array is also known as subscript variable . In the given figure arrangement of array elements are shown. The address of the first element is 100. If the given array is of type integer and integer occupies 2 bytes then the next element in the array has address 102,104 etc as given in the figure. How to access array elements using subscript operator it is also shown in the given figure. Array index always start with 0. To access array element subscript operator is used.[] is called subscript operator.a[0] read a of 0 or 0th element of a C
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Program to check a year is leap year or not.

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Problem Description If a year is divisible by 4, then it is called leap year. But all the centuries are divisible by 4, so to check a century is a leap year or not, we check divisibility by 400 of a year. If a century is divisible by 400 then the century is called leap year otherwise not. Basic Logic Snippets (In C) if(year % 100 == 0) { if (year % 400 == 0) { printf("%d is a leap year",year); } else { printf("%d is not a leap year",year); } }else { if(year % 4 == 0) { printf("%d is a leap year",year); } else { printf("%d is not a leap year",year); } } Output Test-1 Enter any year: 1996 1996 is a leap year Test-2 Enter any year: 1600 1600 is a leap year Test-3 Enter any year: 1800 1800 is not a leap year Improved your logic Note: Generate wrong output in some cases, but helpful to understand upcoming logic if(year % 100 == 0 && year % 400 ==0 || year % 4 == 0) { printf("%d is a leap year
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Data types in Java

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What is Data type In Java every variable have some type.  For example in the code snippet below x should be int and b should be boolean type variable. x = 10; b = true; Similarly in Java every expression also have some type. For example in the following code snippet if a + b + c would result int type result because a, b and c are int type variables. int a, b, c, d; a = 1; b = 1; c = 1; d  = a + b + c; Strictly type checking  In Java, each type is strictly defined means byte have range from -128 to 127, so value out of from this range is not acceptable by byte type. Each assignment is strictly checked for type compatibility. Due to above two reason java is called strongly type checked language.   Primitive Data Types 8 Primitive Data types in Java Signed / Unsigned Data types Examples int a = 10;  ( ✓ ) int a = -10;  ( ✓ ) float x = -5.8;  ( ✓ ) char ch = -'a';  (✕) boolean b = -true;  (✕) boolean b = true;  ( ✓ ) Except boolean and
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