Question

Write a function in Java called factorial() that will take a positive integer as input and returns its factorial as output.

Answer 1

Answer:

The function is as follows:

public static int factorial(int n){

       int fact = 1;

       for(int i=2;i<=n;i++){

           fact*=i;

       }

       return fact;

   }

Explanation:

This line defines the function

public static int factorial(int n){

This declares and initializes variable fact to 1    

  int fact = 1;

This iterates from 2 to n

       for(int i=2;i<=n;i++){

This line multiplies all integers from 1 to n

           fact*=i;

       }

This returns the factorial

       return fact;

   }