Program for Factorial Using Recursion

January 25, 2023

Factorial

We will write a C program for calculate the factorial and the number will be entered by the user. This will help to understand the basic structure of programming. In this program , we will display the factorial of given number easily by using proper syntax and algorithms.

Working of Program :

In the program, we will require some numbers from the user to display the factorial of given numbers.

Important Note :

To calculate the factorial, factorial is used for exponential function in power series.
Symbol of factorial is ! and value of 0! is 1.

Problem 1

Write a program to calculate factorial of given numbers.

Firstly, we have to enter the numbers.
Then print the factorial.

Code

Run

#include<stdio.h>
long int multiplyNumbers (int n);
int main ()
{
  int n;
  printf ("Enter a positive integer = ");
  scanf ("%d", &n);
  printf ("Factorial of %d = %ld", n, multiplyNumbers (n));
  return 0;
}
long int multiplyNumbers (int n)
{
  if (n >= 1)
    return n * multiplyNumbers (n - 1);
  else
    return 1;
}

Output

Enter a positive integer = 5
Factorial of 5 = 120

Fibonacci Series upto nth term

Find the Nth Term of the Fibonacci Series

Factorial of a number

Power of a number

Factor of a number

Strong number

Note:

In the following program we will display the factorial of given numbers.

Problem 2

Write a program to calculate the factorial.

Firstly, we have to enter the number.
Then print the factorial.

Code

Run

#include<stdio.h>
long factorial (int n)
{
  if (n == 0)
    return 1;
  else
    return (n * factorial (n - 1));
}
void main ()
{
  int number;
  long fact;
  printf ("Enter a number = ");
  scanf ("%d", &number);
  fact = factorial (number);
  printf ("Factorial of %d = %ld\n", number, fact);
  return 0;
}

Output

Enter a number = 6
Factorial of 6 = 720

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Program for Factorial Using Recursion

Factorial

Working of Program :

Important Note :

Problem 1

Code

Output

Note:

Problem 2

Code

Output

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