Add tests to Math (#423)

* Add prettier config

* test: add test to check for absolute function

* chore: es5 to es6

* test: add test to check mean function

* test: add test for sum of digit

* test: add test for factorial

* test: add test for fibonnaci

* test: add test for find HCF

* test: add test for lcm

* test: add gridget test

* test: add test for mean square error

* test: add test for modular binary exponentiation

* test: add tests for palindrome

* test: add test for pascals triangle

* test: add tests for polynomial

* test: add tests for prime check

* test: add tests for reverse polish notation

* test: add tests for sieve of eratosthenes

* test: add tests for pi estimation monte carlo method

* chore: move tests to test folder

* chore: fix standardjs errors

Maths/FindLcm.js

@@ -12,9 +12,19 @@
 'use strict'
 
 // Find the LCM of two numbers.
-function findLcm (num1, num2) {
-  var maxNum
-  var lcm
+const findLcm = (num1, num2) => {
+  // If the input numbers are less than 1 return an error message.
+  if (num1 < 1 || num2 < 1) {
+    return 'Please enter values greater than zero.'
+  }
+
+  // If the input numbers are not integers return an error message.
+  if (num1 !== Math.round(num1) || num2 !== Math.round(num2)) {
+    return 'Please enter whole numbers.'
+  }
+
+  let maxNum
+  let lcm
   // Check to see whether num1 or num2 is larger.
   if (num1 > num2) {
     maxNum = num1
@@ -24,15 +34,10 @@ function findLcm (num1, num2) {
   lcm = maxNum
 
   while (true) {
-    if ((lcm % num1 === 0) && (lcm % num2 === 0)) {
-      break
-    }
+    if (lcm % num1 === 0 && lcm % num2 === 0) break
     lcm += maxNum
   }
   return lcm
 }
 
-// Run `findLcm` Function
-var num1 = 12
-var num2 = 76
-console.log(findLcm(num1, num2))
+export { findLcm }