JavaScript Algorithm: Return the Next Number from the Integer Passed

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Photo by Jukan Tateisi on Unsplash

Incrementing — increasing values by one — is a ubiquitous operation in programming. Want to count things, generate IDs, or just add 1 more of something? Let’s tackle this basic JS concept by building our own custom increment function.

In a few simple steps, we’ll take a number as input, add 1 to it, and return the result. Ready for some quick, handy syntax? Let’s get started!

Defining Our Function

First, we initialize the function signature and input parameter:

function increment(num) {

}

By accepting num as input, we indicate that values can be passed here later when calling the function.

Adding One

Inside the body, we take that num value and add 1 to it:

function increment(num) {
  var result = num + 1;

}

Using the += assignment operator is a common shortcut for incrementing values in place.

Returning the Result

Finally, we return the new result value out of the function:

function increment(num) {
  var result = num + 1;
  return…