Improved `abs` function #923

Original file line number	Diff line number	Diff line change
		@@ -1,22 +1,22 @@
		/**
	* @function absVal
	* @function abs
		* @description This script will find the absolute value of a number.
	* @param {Integer} num - The input integer
	* @return {Integer} - Absolute number of num.
	* @see [Absolute_value](https://en.wikipedia.org/wiki/Absolute_value)
	* @example absVal(-10) = 10
	* @example absVal(50) = 50
	* @example absVal(0) = 0
	* @param {number} num - The input integer
	* @return {number} - Absolute number of num.
	* @see https://en.wikipedia.org/wiki/Absolute_value
	* @example abs(-10) = 10
	* @example abs(50) = 50
	* @example abs(0) = 0
		*/

	const absVal = (num) => {
	// Find absolute value of `num`.
	'use strict'
	if (num < 0) {
	return -num
	const abs = (num) => {
	const validNumber = +num // converted to number, also can use - Number(num)

	if (Number.isNaN(validNumber)) {
	throw new TypeError('Argument is NaN - Not a Number')
		}
	// Executes if condition is not met.
	return num

	return validNumber < 0 ? -validNumber : validNumber // if number is less then zero mean negative then it converted to positive. i.e -> n = -2 = -(-2) = 2
		}

	export { absVal }
	export { abs }

31 changes: 26 additions & 5 deletions Maths/test/Abs.test.js

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Original file line number	Diff line number	Diff line change
		@@ -1,18 +1,39 @@
	import { absVal } from '../Abs'
	import { abs } from '../Abs'

	describe('Testing abs function', () => {
	it('Testing for invalid types', () => {
	expect(() => abs('234a')).toThrow()
	expect(() => abs({})).toThrow()
	expect(() => abs([12, -32, -60])).toThrow()
	})

	it('Testing for number of string type', () => {
	expect(abs('-345')).toBe(345)
	expect(abs('-345.455645')).toBe(345.455645)
	})

	it('Testing for a boolean type', () => {
	expect(abs(true)).toBe(1)
	expect(abs(false)).toBe(0)
	})

	describe('absVal', () => {
		it('should return an absolute value of a negative number', () => {
	const absOfNegativeNumber = absVal(-34)
	const absOfNegativeNumber = abs(-34)
		expect(absOfNegativeNumber).toBe(34)
		})

		it('should return an absolute value of a positive number', () => {
	const absOfPositiveNumber = absVal(50)
	const absOfPositiveNumber = abs(50)
		expect(absOfPositiveNumber).toBe(50)
		})

		it('should return an absolute value of a zero number', () => {
	const absOfPositiveNumber = absVal(0)
	const absOfPositiveNumber = abs(0)
		expect(absOfPositiveNumber).toBe(0)
		})

	it('should return an absolute value of any floating number', () => {
	const absOfPositiveNumber = abs(-20.2034)
	expect(absOfPositiveNumber).toBe(20.2034)
	})
		})

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