How do you reverse a factorial in Java?

“Reverse factorial program in java” Code Answer

1. // Reverse factorial program in java.
2. import java. util. Scanner;
3. public class ReverseFactorialProgram.
4. {
5. public static void main(String[] args)
6. {
7. Scanner sc = new Scanner(System. in);
8. System. out. println(“Please enter a number to compute reverse factorial: “);

How do you calculate reverse factorial?

Factorial is successive multiplication! The inverse of multiplication is Division! So, the inverse of Factorial can be successive division! :P….In your example:

1. n=120 , 120/2=60=n1.
2. n1/3=60/3=20= n2.
3. 20/4=5 =n3.
4. n3/5=5/5=1 , so 120=5!

How do you find the factorial of a number in Java with a for loop?

Let’s see the factorial Program using loop in java.

1. class FactorialExample{
2. public static void main(String args[]){
3. int i,fact=1;
4. int number=5;//It is the number to calculate factorial.
5. for(i=1;i<=number;i++){
6. fact=fact*i;
7. }
8. System.out.println(“Factorial of “+number+” is: “+fact);

What is the inverse operation of factorial?

The factorial does not have an inverse, since 0!= 1!= 1. The gamma function also does not have an inverse.

Is there an anti factorial?

Yes, assuming we are working over positive Integers. Take your number x, divide by 2, then by 3,…. Then, if you reach a non-integer , your number does not have an anti-factorial, i.e., x is not the factorial of any number.

How do you find the factorial of 100 in Java?

int x = 100; int result = 1; for (int i = 1; i < (x + 1); i++) { result = (result * i); } System. out. println(result);

What is the reverse factorial?

You can just divide the “answer” by consecutive positive integers, and when the result is 1, the last number you divided by is the number that the “answer” is factorial of. For example: 120 / 2 = 60 , 60 / 3 = 20 , 20 / 4 = 5 , 5 / 5 = 1 , so the number that 120 is the factorial of is 5.

How to write factorial program in Java?

The Factorial program in Java, we have written the following program in five different ways, using standard values, using while loop, using for loop, u sing do while loop, using method or function, using recursion.

Why is factorial a long variable in Java?

Although we are calculating the factorial of an integer variable, we declared output (Factorial) as a long variable. Because, when we are writing a Java program for calculating the factorial for large integers, the result will cross the integer limit.

What is a factorial number return type?

It means every time we call the FactorialNumber ( ) function it will return factorial value of type long. NOTE: If we create a function with Void then there is no need to return any value but, if we declared a function with any data type (int, float etc) then we have return something out from the function.

How do you find the factorial of an integer variable?

1. Take integer variable A 2. Assign a value to the variable 3. From value, A up to 1 multiply each digit and store 4. The final stored value is factorial of A