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

#include<stdio.h>
#include<conio.h>
  void main()
{
  int n,i;
  int sum=0;
  clrscr();
  printf("\n enter the number n");
  scanf("\n %d",&n);
  sum=(n*(n+1)*(2*n+1))/6;
  printf("\n sum of series =");
  for(i=1;i<=n;i++)
{
  if(i!=n)
{
  printf(" %d^2",i);
}
  else
{
  printf(" %d^2=%d",i,sum);
}
}
  return(0);
}

  output:-
  enter the number n=5
  sum of series =1^2+2^2+3^2+4^2+5^2=55