Factorial Program Using Loop in Java

9/3/2021
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#Factorial Program Using Loop in Java  #java #loop #javaFactorial

Factorial Program Using Loop in Java

Factorial Program Using Loop in Java

Factorial Program in scala : Factorial of n is the product of all positive descending integers like (1,2,3...). 
Factorial of n number is denoted by n!. For example of scala factorial program:
 
4! = 4*3*2*1 = 24  
5! = 5*4*3*2*1 = 120 
 
 

Let's See the Factorial Program Using Loop in Java.

This program, we define a function factorial that calculates the factorial of a given integer n . 
The base case for the recursive function is when n is 0 or 1, in which case the factorial is 1. 
Otherwise, the function calls itself with n - 1 and multiplies the result by n and  we got expected result.
 

Example 1 without recursion :

class FactorialExample{ 
public static void main(String args[]){ 
  int i,fact=1; 
  int number=5;//It is the number to calculate factorial   
  for(i=1;i<=number;i++){   
      fact=fact*i;   
  }   
  System.out.println("Factorial of "+number+" is: "+fact);   
} 
}
 

Example 2 with recursion :

  public static int factorial(int n) {
        if (n == 0 || n == 1) {
            return 1;
        } else {
            return n * factorial(n - 1); // recursion call
        }
    }
 

​Conclusion :

In the main method, we call the factorial function with recursion way and we have another example without recursion.

This Solution is provided by Shubham mishra

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