How to Round Calculations in JavaScript

---

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Unable to round simple javascript calculation

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Understanding the Problem: Rounding JavaScript Calculations

When working with calculations in JavaScript, especially when dealing with decimal values, you might find the need to round numbers to the nearest integer. A common error developers face is attempting to format numbers without achieving the desired outcome. In this guide, we will explore a scenario where a developer had trouble rounding a JavaScript calculation output to the nearest integer and provide a solid solution to this common issue.

The Challenge

The issue arose in a JavaScript function, where the output was formatted to two decimal places, instead of being rounded to the nearest integer. Here’s a snippet of the original code that highlights the issue:

[[See Video to Reveal this Text or Code Snippet]]

The output here is a string that represents the calculated number in two decimal places—a format that isn’t suitable if the aim is to have a whole number.

The Solution: Rounding to the Nearest Integer

Using toFixed()

The toFixed() method formats a number using fixed-point notation. To round to the nearest integer, you simply set the argument to 0, like so:

[[See Video to Reveal this Text or Code Snippet]]

This method converts the number to a string, rounding it as needed. If you want the final result to be a number instead of a string, you can wrap the call in parseInt() or Number():

[[See Video to Reveal this Text or Code Snippet]]

[[See Video to Reveal this Text or Code Snippet]]

To implement this in your existing function, you can simply replace the line that sets y to the formatted string with a rounding function:

[[See Video to Reveal this Text or Code Snippet]]

Updating Your Function

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

For any other programming woes, don’t hesitate to ask for help—sometimes a little guidance goes a long way!