Question

d. Rewrite the following program segment using the while loop. Then write the
complete Java code including the while loop to print the factorial of 5.
int factorial = 1, i;
for (i = 1; i <= 5; i++)
factorial *= i;
System.out.println (“Factorial of 5 = + factorial);​

Answer 1

Answer:

Java Program to Find Factorial using For and While loop

BY CHAITANYA SINGH | FILED UNDER: JAVA EXAMPLES

We will write three java programs to find factorial of a number. 1) using for loop 2) using while loop 3) finding factorial of a number entered by user. Before going through the program, lets understand what is factorial: Factorial of a number n is denoted as n! and the value of n! is: 1 * 2 * 3 * … (n-1) * n

The same logic we have implemented in our programs using loops. To understand these programs you should have a basic knowledge of following topics of java tutorials:

For loop in Java

Java – while loop

Example: Finding factorial using for loop

public class JavaExample {

public static void main(String[] args) {

//We will find the factorial of this number

int number = 5;

long fact = 1;

for(int i = 1; i <= number; i++)

{

fact = fact * i;

}

System.out.println("Factorial of "+number