C Program to Find Sum of Natural Numbers Using While Loop

Problem :- Write A C Program to Find Sum of Natural Numbers Using While Loop

Logic :- What is Natural Number ?

Natural Numbers Are Positive numbers Start With 1 Not 0 ( Zero )

So idea is simple use loop ans initialize with 1 and run into last terms ( Till you Want ) ,you can also print the sum of natural number using formula there are 2 method for solve.

Method 1 :-Using Formula

Natural Number = (N*(N+1))/2

Method 2:- Using Loop

while(count<=n)

{

sum+=count;

++count;

}

Try Yourself C++ Program To Check Number Is Armstrong Or Not

Solution :-

Method 1:-

#include<stdio.h>

int main()

{

  //Ghanendra Yadav

    int n, count=1, sum=0;

    

    while(1)

    {

printf("\nEnter The Natural Number :\n");

    scanf("%d",&n);

    

while(count<=n)

    {

        sum+=count;

        ++count;

    }

    

printf("\nSum Of Natural Number Is  = %d\n",sum);

    

}

return 0;

}

Method 2:-

#include<stdio.h>

int main()

{

  //Ghanendra Yadav

    int n,sum=0;

    

    while(1)

    {

printf("\nEnter The Natural Number :\n");

    scanf("%d",&n);

    

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

printf("\nSum Of Natural Number Is  = %d\n",sum);

    

}

return 0;

}

Output:-