35 lines
933 B
Java
35 lines
933 B
Java
package Maths;
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import java.util.*; //for importing scanner
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public class Factorial {
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public static void main(String[] args) { //main method
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int n = 1;
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Scanner sc= new Scanner(System.in);
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System.out.println("Enter Number");
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n=sc.nextInt();
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System.out.println(n + "! = " + factorial(n));
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}
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//Factorial = n! = n1 * (n-1) * (n-2)*...1
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/**
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* Calculate factorial N
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*
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* @param n the number
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* @return the factorial of {@code n}
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*/
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public static long factorial(int n) {
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// Using recursion
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try {
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if (n == 0) {
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return 1; // if n = 0, return factorial of n;
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}else {
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return n*factorial(n-1); // While N is greater than 0, call the function again, passing n-1 (Principle of factoring);
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}
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}catch (ArithmeticException e) {
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System.out.println("Dont work with less than 0");
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}
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return n;
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}
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}
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