freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/reverse-a-string.english.md

id, title, isRequired, challengeType

id	title	isRequired	challengeType
a202eed8fc186c8434cb6d61	Reverse a String	true	5

Description

Reverse the provided string. You may need to turn the string into an array before you can reverse it. Your result must be a string. Remember to use Read-Search-Ask if you get stuck. Write your own code.

Instructions

Tests

tests:
  - text: <code>reverseString("hello")</code> should return a string.
    testString: assert(typeof reverseString("hello") === "string", '<code>reverseString("hello")</code> should return a string.');
  - text: <code>reverseString("hello")</code> should become <code>"olleh"</code>.
    testString: assert(reverseString("hello") === "olleh", '<code>reverseString("hello")</code> should become <code>"olleh"</code>.');
  - text: <code>reverseString("Howdy")</code> should become <code>"ydwoH"</code>.
    testString: assert(reverseString("Howdy") === "ydwoH", '<code>reverseString("Howdy")</code> should become <code>"ydwoH"</code>.');
  - text: <code>reverseString("Greetings from Earth")</code> should return <code>"htraE morf sgniteerG"</code>.
    testString: assert(reverseString("Greetings from Earth") === "htraE morf sgniteerG", '<code>reverseString("Greetings from Earth")</code> should return <code>"htraE morf sgniteerG"</code>.');

Challenge Seed

function reverseString(str) {
  return str;
}

reverseString("hello");

Solution

function reverseString(str) {
  return str.split('').reverse().join('');
}

reverseString("hello");