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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

Returns the sum of the powers of all the numbers from start to end (both inclusive)

Example:

const sumPower = (end, power = 2, start = 1) =>
  Array(end + 1 - start)
    .fill(0)
    .map((x, i) => (i + start) ** power)
    .reduce((a, b) => a + b, 0);
console.log(sumPower(10)); // 385
console.log(sumPower(10, 3)); // 3025
console.log(sumPower(10, 3, 5)); // 2925

Output:

385
3025
2925