Write a JavaScript function that reverse a number.

Sample Data and output:
Example x = 32243;
Expected Output: 34223

  


            //reverse a number
            function reverseNumber(n)
            {
            n = n + "";
            return n.split("").reverse().join("");
            }
            console.log(reverseNumber(32243));
        

Explanation:
Assume n = 1000.
Convert a number to a string :
Code : -> n = n + "";
Note : There are different ways to convert number to string :

  • String literal -> str = "" + num + "";
  • String constructor -> str = String(num);
  • toString -> str = num.toString();
  • String Literal simple -> str = "" + num;

The split() method is used to split a String object into an array of strings by separating the string into substrings.
Code : console.log('1000'.split(""));
Output : ["1", "0", "0", "0"]

The reverse() method is used to reverse an array in place. The first array element becomes the last and the last becomes the first.
Code : console.log(["1", "0", "0", "0"].reverse());
Output : ["0", "0", "0", "1"]

The join() method is used to join all elements of an array into a string.
Code : console.log(["1", "0", "0", "0"].reverse().join(""));
Output : "0001"