Constants in c :
Constants declaration in c :
Constants in c is a variable that cannot modified through the code .
1 . Using const keyword
2 . Using #define keyword
1.using const keyword
Syntax : const datatype variable =
Example : const float pi= 3.14
2. Using #define
The #define preprocessor is also used to define constant.
#define datatype variable
Write a c program using constants
//Write a c program to demonstrate using constant keyword. Using const
#include<stdio.h>
int main()
{
const float pi=3.14;
printf("the value of pi is %f",pi);
}
//Write a c program to demonstrate using constant keyword. Using #define
#include<stdio.h>
#define pi 3.14
int main()
{
printf("the value of pi is %f",pi);
}