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C Program to Find Sum of n Natural Numbers

YasminRadwan26
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2022-06-27
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you have to make this program in the following way:

  • C Program to Find Sum of n Natural Numbers (Simple Way – Using For Loop )
  • C Program to Find the Sum of n Natural Numbers Using While Loop
  • C Program to Find the Sum of n Natural Numbers Using Do While Loop
  • C Program to Find the Sum of n Natural Numbers Using Function
  • C Program to Find the Sum of n Natural Numbers Using Recursion
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YasminRadwan26
2022-06-27
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C Program to Find Sum of n Natural Numbers For Loop

Algorithm

  • Program Start
  • Variable Declaration (i,n,sum)
  • Input a Number from the User
  • Calculating Sum of n Naturals Numbers
  • Displaying the Sum of n Naturals Numbers
  • Program End

Program

//C Program to Find the Sum of n Natural Numbers Using For loop

#include<stdio.h>
int main()
{
 //Declaring Variable
  int n, i, sum = 0 ;
 
//Input Number
 printf("Enter a Number\n");
  scanf("%d",&n);
 
 for(i=1;i<=n;i++)
  {
      sum = sum + i;
  }
  printf("\nSum of %d Natural Numbers = %d",n, sum);
  return 0;
}

Output

Enter a Number
5

Sum of 5 Natural Numbers = 15

C Program to Find the Sum of n Natural Numbers Using While Loop

Algorithm

  • Program Start
  • Variable Declaration
  • Input a Number from the User
  • Calculating Sum of n Naturals Numbers
  • Displaying the Sum of n Naturals Numbers
  • Program End

Program

//C Program to Find the Sum of n Natural Numbers Using While Loop

#include<stdio.h>
void main()
{
  int n, i=1, sum = 0 ;
  printf("Enter a Number\n");
  scanf("%d",&n);

  while(i<=n)
  {
      sum = sum + i;
      i++;
  }
  printf("\nSum of %d Natural Numbers = %d",n, sum);
}

Output

Enter a Number
10

Sum of 10 Natural Numers = 55

C Program to Find the Sum of n Natural Numbers Using Do While Loop

Program

//C Program to Find the Sum of n Natural Numbers Using Do While Loop

#include<stdio.h>
int main()
{
  int n, i=1, sum = 0 ;
  printf("Enter A Number to Calculate Sum\n");
  scanf("%d",&n);
do
  {
      sum = sum + i;
      i++;
  }while(i<=n);

  printf("\nSum of %d Natural Numbers = %d",n, sum);

return 0;
}

Output

Enter  A Number to Calculate Sum
15

Sum of 15 Natural Numbers = 120

C Program to Find the Sum of n Natural Numbers Using Function

Algorithm

  • Program Start
  • Declaring variables
  • Input Number
  • Calling Function to calculate Sum of n Natural Numbers
  • Print the Sum of n Numbers
  • Program End

Program

//C Program to Find the Sum of n Natural Numbers Using function

#include<stdio.h>
int sum(int);
void main()
{
  int n, i=1, s;
  
 printf("Enter A Number\n");
  scanf("%d",&n);
 
  s=sum(n);
  printf("\nSum of %d Natural Numbers = %d",n, s);
}
int sum(int n)
{
    int i,sum=0;
    for(i=1;i<=n;i++)
    {
        sum = sum + i;
    }
    return (sum);
}

Output

Enter A Number 
20

Sum of 20 Natural Numbers = 210

C Program to Find the Sum of n Natural Numbers Using Recursion

Algorithm

  • Program Start
  • Declaring variables
  • Input Number
  • Calling Recursive Function to calculate Sum of N Natural Numbers
  • Print the Sum of n Natural Numbers
  • Program End

Program

//C Program to Find the Sum of n Natural Numbers Using Recursion

#include<stdio.h>
int sum(int);
void main()
{
  int n, s;

 printf("Enter A Number\n");
  scanf("%d",&n);

  s=sum(n);
  printf("\nSum of %d Natural Numbers = %d",n, s);
}
int sum(int n)
{
    int s=0;

    if(n==1)
        return (n);

    s = n + sum(n-1);
     return (s);
}

Output

Enter a Number
25

Sum of 25 Natural Numbers = 325

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