reverseDigits()

Step 1: Understand the Problem

The first step before diving into coding is getting a clear understanding of the problem. In this case, we want to write a function that reverses the digits of a given integer. For example, for input 123, the output should be 321.

function reverseDigit(n) {
  // Our code will go here
}

Step 2: Convert the Number to a String

The JavaScript method toString() can convert a number to a string. This is the first step towards solving our problem.

function reverseDigit(n) {
  let stringNumber = n.toString();
}

Step 3: Convert the String to an Array

Next, we'll use the split('') method to turn our string into an array of characters. Each digit will become a separate element in the array.

function reverseDigit(n) {
  let stringNumber = n.toString();
  let arrayNumber = stringNumber.split('');
}

Step 4: Reverse the Array and Join the Elements Back into a String

Now, we can use the reverse() method to reverse the order of the elements in our array. Then, the join('') method can be applied to combine the array elements back into a single string.

function reverseDigit(n) {
  let stringNumber = n.toString();
  let arrayNumber = stringNumber.split('');
  let reverseString = arrayNumber.reverse().join('');
}

Step 5: Convert the String Back to a Number

Finally, we can use the Number() function to convert our reversed string back into a number. This will be the output of our reverseDigit function.

function reverseDigit(n) {
  let stringNumber = n.toString();
  let arrayNumber = stringNumber.split('');
  let reverseString = arrayNumber.reverse().join('');
  return Number(reverseString);
}

And there you have it! We've successfully written a function to reverse the digits of an integer using JavaScript.