C Programming => Functions
C program to find square of given number using function concept. This program demonstrate use of function without an argument and a return value.
Program code
#include<stdio.h>
int square(); //function prototype declaration.
int number; //use of global variable
int main()
{
int answer;
answer = square(); //Call function.
printf("Square of %d is %d.", number, answer);
return 0;
}
//User defined function to find square()
int square()
{
printf("Enter your number:");
scanf("%d", &number);
//return answer to main function
return(number*number);
}
Output of the program
Square of 5 is 25.
