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Siva Nookala - 23 Feb 2017
 Factorial is the process multiplying all the natural numbers below the given number. This is very useful in probability for calculating the permutations and combinations. Here we will talk about the "Factorial Using While Loop" Java program. This Java program shows how to calculate the factorial of a given number using while Loop In Java. Factorial using while loopCODE Try it Online`class FactorialUsingWhile{    public static void main(String arg[])    {        int factorial = 1;        int number = 6;                int i = 1;        while(i <= number)        {            factorial *= i;            i++;        }                System.out.println("Factorial of number " + number + " is " + factorial);        }}`OUTPUTFactorial of number 6 is 720DESCRIPTIONThis program finds the factorial of the given `number` 6, by multiplying the variable `factorial` with various values of i - `1, 2, 3, 4, 5, 6`. So at the end of the `while` loop the value of factorial will be `1 * 2 * 3 * 4 * 5 * 6 = 720`THINGS TO TRYTry to find the factorial of `5` using `for`. Try to find the factorial of `9` using `do-while`.
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