Program to find sum of squares of first n natural numbers using for loop

Logic:

• Enter the number n
• sum= 1² + 2²+ 3² + 4 ²+……..+n²

Algorithm

1. Enter the number as n
2. Initially assign sum=0
3. for(i=1;i<=n;i++)
4. sum=sum + i * i;
5. Print sum

Program

#include<stdio.h>
void main()
{
    
    printf("**************************************************************");
    printf("\n**************************************************************");
    printf("\n**  WAP to print sum of squares of first n natural numbers  **");
    printf("\n**                 Created by Sheetal Garg                  **");
    printf("\n**                    Assistant Professor                   **");
    printf("\n**                    Phone No:9467863365                   **");
    printf("\n**************************************************************");
    printf("\n**************************************************************\n");
    int i,n,s=0;
    printf("Enter number upto which square you want to add\n");
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    s=s+i*i;
    printf("sum is %d",s);
}

Output 1

***************************************************************************
***************************************************************************
**       WAP to print sum of squares of first n natural numbers          **
**                          Created by Sheetal Garg                      **
**                            Assistant Professor                        **
**                            Phone No:9467863365                        **
***************************************************************************
***************************************************************************
Enter number upto which square you want to add
5
sum is 55