Change project structure to a Maven Java project + Refactor (#2816)

src/main/java/com/thealgorithms/maths/KrishnamurthyNumber.java

@@ -0,0 +1,56 @@
+package com.thealgorithms.maths;
+
+/* This is a program to check if a number is a Krishnamurthy number or not.
+A number is a Krishnamurthy number if the sum of the factorials of the digits of the number is equal to the number itself.
+For example, 1, 2 and 145 are Krishnamurthy numbers.
+Krishnamurthy number is also referred to as a Strong number.
+ */
+import java.io.*;
+
+public class KrishnamurthyNumber {
+    //returns True if the number is a Krishnamurthy number and False if it is not.
+
+    public static boolean isKMurthy(int n) {
+        //initialising the variable s that will store the sum of the factorials of the digits to 0
+        int s = 0;
+        //storing the number n in a temporary variable tmp
+        int tmp = n;
+
+        //Krishnamurthy numbers are positive
+        if (n <= 0) {
+            return false;
+        } //checking if the number is a Krishnamurthy number
+        else {
+            while (n != 0) {
+                //initialising the variable fact that will store the factorials of the digits
+                int fact = 1;
+                //computing factorial of each digit
+                for (int i = 1; i <= n % 10; i++) {
+                    fact = fact * i;
+                }
+                //computing the sum of the factorials
+                s = s + fact;
+                //discarding the digit for which factorial has been calculated
+                n = n / 10;
+            }
+
+            //evaluating if sum of the factorials of the digits equals the number itself
+            if (tmp == s) {
+                return true;
+            } else {
+                return false;
+            }
+        }
+    }
+
+    public static void main(String args[]) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        System.out.println("Enter a number to check if it is a Krishnamurthy number: ");
+        int n = Integer.parseInt(br.readLine());
+        if (isKMurthy(n)) {
+            System.out.println(n + " is a Krishnamurthy number.");
+        } else {
+            System.out.println(n + " is NOT a Krishnamurthy number.");
+        }
+    }
+}