C program to calculate sum of first n even numbers between 0 and n.? Take n as input from user?
Sol.
Input : n = 6
Output : 42
Even numbers : 2, 4, 6, 8, 10, 12, 14, 16…
Sum of first 6 even numbers :
= (2+4+6+8+10+12) = 42
/* C program to find
*sum of even numbers betwe 0 to n*/
#include <stdio.h>
int main()
{
int count, n, evenNo, sumOfEvens=0;
/* Input number from use */
printf(“Enter number : n”);
scanf(“%d”, &n);
/* Even number start from 0
*and get increamented by 2 */
for(count=0,evenNo=0; count<=n; count=count+1, evenNo=evenNo+2)
{
/* Add current even number to
**sumOfEvens variable */
sumOfEvens = sumOfEvens + evenNo;
}
printf(“Sum of all even numbers between 0 to %d = %d”, n, sumOfEvens);
return 0;
}
Output :
