Add least common multiple algorithm (#3216)

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

@@ -0,0 +1,50 @@
+package com.thealgorithms.maths;
+import java.util.*;
+/**
+ * Is a common mathematics concept to find the smallest value number 
+ * that can be divide using either number without having the remainder. 
+ * https://maticschool.blogspot.com/2013/11/find-least-common-multiple-lcm.html
+ * @author LauKinHoong
+ */
+
+public class LeastCommonMultiple {
+    /**
+     * Driver Code
+     */
+    public static void main(String[] args) {
+		
+		Scanner input = new Scanner(System.in);
+        System.out.println("Please enter first number >> ");
+        int num1 = input.nextInt();
+        System.out.println("Please enter second number >> ");
+        int num2 = input.nextInt();
+        System.out.println("The least common multiple of two numbers is >> " + lcm(num1,num2));
+
+	}
+	
+    /*
+     * get least common multiple from two number
+     */
+	public static int lcm (int num1, int num2){
+        int high, num3;
+        int cmv = 0;
+        /*
+         * value selection for the numerator
+         */
+        if (num1 > num2){
+            high = num3 = num1;
+        }
+        else{
+            high = num3 = num2;
+        }
+
+        while(num1 != 0){
+            if(high % num1 == 0 && high % num2 == 0){
+                cmv = high;
+                break;
+            }
+            high += num3;
+        }
+        return cmv;
+    }
+}