C Program to find Sum of N natural numbers using recursion

By | 28.11.2016

Sum of N natural numbers using recursion


Write a C Program to find Sum of N natural numbers using recursion. Here’s simple Program to find Sum of N natural numbers using recursion in C Programming Language.


Recursion : :


  • Recursion is the process of repeating items in a self-similar way. In programming languages, if a program allows you to call a function inside the same function, then it is called a recursive call of the function.
  • The C programming language supports recursion, i.e., a function to call itself. But while using recursion, programmers need to be careful to define an exit condition from the function, otherwise it will go into an infinite loop.
  • Recursive functions are very useful to solve many mathematical problems, such as calculating the factorial of a number, generating Fibonacci series, etc.

Here is the source code of the C Program to find Sum of N natural numbers using recursion. The C Program is successfully compiled and run on a Windows system. The program output is also shown below.


SOURCE CODE : :


/*  C Program to find Sum of N natural numbers using recursion  */

#include<stdio.h>

int sum(int);

int main()
{
    int n, s;

    printf("Enter the value of N :: ");
    scanf("%d", &n);

    s= sum(n);

    printf("\nThe Sum of [ 1 + ... + %d ] numbers is :: %d\n",n,s);

    return 0;
}

int sum(int x)
{
    if(x==0)
      return(0);

    else
      return(x + sum(x-1));
}

OUTPUT : :


/*  C Program to find Sum of numbers 1 to N using recursion  */

Enter the value of N :: 10

The Sum of [ 1 + ... + 10 ] numbers is :: 55

Process returned 0

Above is the source code for C Program to find Sum of N natural numbers using recursion which is successfully compiled and run on Windows System.The Output of the program is shown above .

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About Tunde A

My name is Tunde Ajetomobi, a Tech Enthusiast and Growth Hacker. I enjoy creating helpful content that solves problem across different topics. Codezclub is my way of helping young aspiring programmers and students to hone their skills and find solutions on fundamental programming languages.

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