Added if number is Even or Odd

src/algorithms/math/bits/__test__/isEven.test.js

@@ -0,0 +1,30 @@
+import isEven from '../isEven';
+
+describe('isEven', () => {
+  it('should get if number is even or not', () => {
+    // 2 = true
+    // 3 = false
+    expect(isEven(2)).toBe(true);
+    expect(isEven(3)).toBe(false);
+
+    // 5 = odd
+    // 6 = even
+    expect(isEven(5)).toBe(false);
+    expect(isEven(6)).toBe(true);
+
+    // 7 = odd
+    // 8 = even
+    expect(isEven(7)).toBe(false);
+    expect(isEven(8)).toBe(true);
+
+    // 9 = odd
+    // 10 = even
+    expect(isEven(9)).toBe(false);
+    expect(isEven(10)).toBe(true);
+
+    // 11 = odd
+    // 12 = even
+    expect(isEven(11)).toBe(false);
+    expect(isEven(12)).toBe(true);
+  });
+});

src/algorithms/math/bits/isEven.js

@@ -0,0 +1,8 @@
+/**
+ * @param {number} number
+ * @param {number} bitPosition - zero based.
+ * @return {number}
+ */
+export default function isEven(number) {
+  return ((number & 1) === 0);
+}