FOR LOOP PROCESSING

• Problem Description

  
  Program to calculate the sum of first n natural numbers
  

• CODING ARENA::

• #include <stdio.h>

  int main()

  {

    int n,i,sum=0;

    scanf("%d",&n);

    for(i=1;i<=n;i++)

      {

      sum=sum+i;

    }

    printf ("%d",sum);

  
  

  return 0;

  }

• Test Case 1

  
  Input (stdin)

  10
  
  

  Expected Output

  55

• Test Case 2

  
  Input (stdin)

  5
  
  

  Expected Output

  15