write a c program to find out the sum of series 1^2 + 2^2 + …. + n^2 | CTechnotips

#include<stdio.h>

int main(){

    int n,i;

    int sum=0;

    printf("Enter the n i.e. max values of series: ");

    scanf("%d",&n);

    sum = (n * (n + 1) * (2 * n + 1 )) / 6;

    printf("Sum of the series : ");

    for(i =1;i<=n;i++){

         if (i != n)

             printf("%d^2 + ",i);

         else

             printf("%d^2 = %d ",i,sum);

    }

    return 0;

}

Sample output:

Enter the n i.e. max values of series: 5

Sum of the series: 1^2 + 2^2 + 3^2 + 4^2 + 5^2 = 55

Mathematical Formula:

Sum of the series 1² + 2² + 3² + … + n² =

n (n+1) (2n+1)/6