Constant

Constant is also a value or variable,but only difference is their values cannot be change by the program once they are defined.Constant are also referd a fixed values and constants may be belonging to any of the data type.

Type of Constant :-

S. No.ConstantExample
1.Integer Constant
2.Real or floating-point Constant'10.2','26.8','424.9' etc.
3.Octal Constant
4.Hexadecimal Constant
5.Character Constant 'a','b','n' etc.
6.String Constant'c program','hello world' etc.

There are two ways to define constant

  • Const keyword
  • #define Preprocessor
  • Const keyword: In C const keyword are used to declare the constants with a specific typeconst type variable = value;
    For Example :-

    #include<stdio.h>
     void main()
     {
     const int height = 100;
     printf("The value of height is :%d", height);
    return 0;
     }

    Now the value of height cannot be changed.

    Output

    The value of height is : 100

    If you change the value of height, you will get an error at the compile time.

  • #define Preprocessor: The #define Preprocessor directive is used to define constant substitution and #define preprocessor are use with specific type
    #define identifier value

    Let’s see the example of #define

    #include<stdio.h>
    #define height=100
    int main(){
    printf("%d",height);
    }

    Output

    100

Submit your review
1
2
3
4
5
Submit
     
Cancel

Create your own review

The Technical Funda
Average rating:  
 0 reviews