What is Constant in C Language?

Constant in C language?

·       Constant is nothing but a keyword in C which is used as const in C.

·       It is used to make variable constant.

· When we declare variable as constant its value become constant or unchangeable.

·       We can define constant in two ways:-

1.    Const Keyword:-

§  We have to use const keyword before any variable to make it constant.

§  Ex:- const int num=3;

 

2.    #define preprocessor:-

§  Using #define we can also create constant.

§  We will learn about C #define preprocessor in another section.

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