feat: Add a 'multiply' function (#63)

Add a function to multiply two numbers: num1 and num2.

none

Author: emilkloeden

src/index.js

@@ -16,6 +16,7 @@ import removeDuplicates from './remove-duplicates'
 import add from './add'
 import subtract from './subtract'
 import divide from './divide'
+import multiply from './multiply'
 
 export {
   flatten,
@@ -36,4 +37,5 @@ export {
   add,
   subtract,
   divide,
+  multiply,
 }

src/multiply.js

@@ -0,0 +1,12 @@
+export default multiply
+
+/**
+ * This method will perform multiply 2 numbers.
+ *
+ * @param {Number} num1 - first number
+ * @param {Number} num2 - second  number
+ * @return {Number} - Result of multiplying first number by second number
+ */
+function multiply(num1, num2) {
+  return num1 * num2
+}

test/multiply.test.js

@@ -0,0 +1,10 @@
+import test from 'ava'
+import {multiply} from '../src'
+
+test('Multiplies two integers ', t => {
+  const number1 = 23
+  const number2 = 3
+  const expected = 23 * 3
+  const actual = multiply(number1, number2)
+  t.deepEqual(actual, expected)
+})