algorithm: decimal to binary (#23)

Author: jonatan5524

src/Maths/BinaryConvert.ts

@@ -0,0 +1,20 @@
+/**
+ * @function BinaryConvert
+ * @description Convert the decimal to binary.
+ * @param {number} num - The input integer
+ * @return {string} - Binary of num.
+ * @see [BinaryConvert](https://www.programiz.com/javascript/examples/decimal-binary)
+ * @example BinaryConvert(12) = 1100
+ * @example BinaryConvert(12 + 2) = 1110
+ */
+
+export const BinaryConvert = (num: number): string => {
+  let binary = ''
+
+  while (num !== 0) {
+    binary = (num % 2) + binary
+    num = Math.floor(num / 2)
+  }
+
+  return binary
+}

src/Maths/test/BinaryConvert.test.ts

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+import { BinaryConvert } from '../BinaryConvert'
+
+describe('BinaryConvert', () => {
+  it('should return the correct value', () => {
+    expect(BinaryConvert(4)).toBe('100')
+  })
+  it('should return the correct value', () => {
+    expect(BinaryConvert(12)).toBe('1100')
+  })
+  it('should return the correct value of the sum from two number', () => {
+    expect(BinaryConvert(12 + 2)).toBe('1110')
+  })
+  it('should return the correct value of the subtract from two number', () => {
+    expect(BinaryConvert(245 - 56)).toBe('10111101')
+  })
+  it('should return the correct value', () => {
+    expect(BinaryConvert(254)).toBe('11111110')
+  })
+  it('should return the correct value', () => {
+    expect(BinaryConvert(63483)).toBe('1111011111111011')
+  })
+})