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JavaScript: Reverse the order of the characters in the string

JavaScript fundamental (ES6 Syntax): Exercise-153 with Solution

Write a JavaScript program to reverse the order of the characters in the string.

  • Use the spread operator (...) and Array.prototype.reverse() to reverse the order of the characters in the string.
  • Combine characters to get a string using String.prototype.join('').

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const reverseString = str => [...str].reverse().join('');

console.log(reverseString('php')); 
console.log(reverseString('foobar'));

Sample Output:

php
raboof

Pictorial Presentation:

JavaScript Fundamental: Reverse the order of the characters in the string.

Flowchart:

flowchart: Reverse the order of the characters in the string

Live Demo:

See the Pen javascript-basic-exercise-153-1 by w3resource (@w3resource) on CodePen.


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Previous: Write a JavaScript program to round a number to a specified amount of digits.
Next: Write a JavaScript program to create an object composed of the properties the given function returns falsey for. The function is invoked with two arguments: (value, key).

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JavaScript: Tips of the Day

How to check whether a string contains a substring in JavaScript?

ECMAScript 6 introduced String.prototype.includes:

const string = "foo";
const substring = "oo";

console.log(string.includes(substring));

includes doesn't have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found: 

var string = "foo";
var substring = "oo";

console.log(string.indexOf(substring) !== -1);

Ref: https://bit.ly/3fFFgZv