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Last Updated On: June 6, 2017
Editor: Adeeb C

Algorithm to find factorial of a number using recursion with C program

Category: C,Programing
Tags

This is the C program code and algorithm to finding factorial of a given number using recursion.

Factorial using Recursion

Aim:

Write a C program to find the factorial of a given number using recursion.

Algorithm:

Step 1: Start
Step 2: Read number n
Step 3: Call factorial(n)
Step 4: Print factorial f
Step 5: Stop

factorial(n)
Step 1: If n==1 then return 1
Step 2: Else 
        f=n*factorial(n-1)
Step 3: Return f

Program code

#include<stdio.h>
#include<conio.h>

void main( )
{
clrscr( )
 int factorial(int);
 int n,f;
 printf("Enter the number: ");
 scanf("%d",&n);
 f=factorial(n);
 printf("Factorial of the number is %d",f);
 getch();
}
int factorial(int n)
{
  int f;
  if(n==1)
     return 1;
  else
     f=n*factorial(n-1);
     return f;
}

Output

Enter the number : 5

Factorial of the number is 120