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Reverse a number in JavaScript
Our aim is to write a JavaScript function that takes in a number and returns its reversed number
For example, reverse of 678 −
876
Here’s the code to reverse a number in JavaScript −
Example
const num = 124323; const reverse = (num) => parseInt(String(num) .split("") .reverse() .join(""), 10); console.log(reverse(num));
Output
Output in the console will be −
323421
Explanation
- Let’s say num = 123
- We convert the num to string → num becomes ‘123’
- We split ‘123’ → it becomes [‘1’, ‘2’, ‘3’]
- We reverse the array → it becomes [‘3’, ‘2’, ‘1’]
- We join the array to form a string → it becomes ‘321’
- Lastly we parse the string into a Int and returns it → 321
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