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JavaScript: Reverse a given string

JavaScript Basic: Exercise-48 with Solution

Write a JavaScript program to reverse a given string.

Pictorial Presentation:

JavaScript: Reverse a given string

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to reverse a given string.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function string_reverse(str) 
{
    return str.split("").reverse().join("");
}

console.log(string_reverse("w3resource"));
console.log(string_reverse("www"));
console.log(string_reverse("JavaScript"));

Sample Output:

ecruoser3w
www
tpircSavaJ

Flowchart:

Flowchart: JavaScript - Reverse a given string

ES6 Version:

function string_reverse(str) 
{
    return str.split("").reverse().join("");
}

console.log(string_reverse("w3resource"));
console.log(string_reverse("www"));
console.log(string_reverse("JavaScript"));

Live Demo:

See the Pen JavaScript - Reverse a string - basic-ex-48 by w3resource (@w3resource) on CodePen.


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Previous: Write a JavaScript program to check if a number in the range 40..10000 presents in two number (in same range).
Next: Write a JavaScript program to replace every character in a given string with the character following it in the alphabet.

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JavaScript: Tips of the Day

Parse an HTTP Cookie header string and return an object of all cookie name-value pairs

Example:

const parseCookie = str =>
  str
    .split(';')
    .map(v => v.split('='))
    .reduce((acc, v) => {
      acc[decodeURIComponent(v[0].trim())] = decodeURIComponent(v[1].trim());
      return acc;
    }, {});
console.log(parseCookie('foo=bar; equation=E%3Dmc%5E2')); // { foo: 'bar', equation: 'E=mc^2' }

Output:

[object Object] {
  equation: "E=mc^2",
  foo: "bar"
}

 

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