Add Iterative Binary Exponentiation

Maths/test/BinaryExponentiationIterative.test.js

@@ -0,0 +1,15 @@
+import { exponent } from '../BinaryExponentiationIterative'
+
+describe('exponent', () => {
+    it('should return 1 when power is 0', () => {
+        expect(exponent(5, 0)).toBe(1)
+    })
+
+    it('should return 0 when base is 0', () => {
+        expect(exponent(0, 7)).toBe(0)
+    })
+
+    it('should return the value of a base raised to a power', () => {
+        expect(exponent(3, 5)).toBe(243)
+    })
+})