Constant in C Programming
Constant is an entity which never changes in the given problem or program. Types of Constant There are basically two types of constants in C. Scalar/ Primitive/ Primary Composite The Scalar types of constant are those which can't be divided any more and the composite constant are those which can be divided into multiple scalar constants. In this article, we only discuss the Scalar/Primitive constant. The Composite constants are discussed later. 1. Integer Constant A number without any fractional part is called Integer constant. Example: 25, 0, -44, 456 etc Rules of Integer Constant No decimal points are allowed. Example 25 is correct but 25.0 is incorrect. Rules of Integer Constant +ve/-ve both types of values are allowed. Special, Comma and other characters are not allowed. Example 2 3 4 and 12,500 are incorrect. Valid Range: -32768 to 32767 2. Floating point constant or real constant Can contain decimal point +ve/-ve both types of values are allo