Add Upper #862

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	/**
	* @function upper
	* @description Will convert the entire string to uppercase letters.
	* @param {String} url - The input URL string
	* @return {String} Uppercase string
	* @example upper("hello") => HELLO
	* @example upper("He_llo") => HE_LLO
	*/

	const upper = (str) => {
	if (typeof str !== 'string') {
	throw new TypeError('Invalid Input Type')
	}

	let upperString = ''

	for (const char of str) {
	let asciiCode = char.charCodeAt(0)
	if (asciiCode >= 97 && asciiCode <= 122) {
	asciiCode -= 32
	}
	upperString += String.fromCharCode(asciiCode)
	}

	return upperString
	}

	export { upper }

9 changes: 9 additions & 0 deletions String/test/Upper.test.js

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	import { upper } from '../Upper'

	describe('Upper', () => {
	it('return uppercase strings', () => {
	expect(upper('hello')).toBe('HELLO')
	expect(upper('WORLD')).toBe('WORLD')
	expect(upper('hello_WORLD')).toBe('HELLO_WORLD')
	})
	})

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