Round Number to Given Precision

Introduction

In this lab, we will explore how to round numbers to a given precision using JavaScript. We will learn how to use the Math.round() method and template literals to round a number to a specified number of digits or to an integer value. This knowledge will be useful in situations where we need to display numbers in a more readable format, such as dealing with currency or measurements.

Here's how to round a number to a given precision in JavaScript:

const round = (n, decimals = 0) =>
  Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`);

• Use Math.round() and template literals to round the number to the specified number of digits.
• If you want to round to an integer, omit the second argument, decimals.
• To start practicing coding, open the Terminal/SSH and type node.
• For example, round(1.005, 2) will return 1.01.

Summary

Congratulations! You have completed the Round Number to Given Precision lab. You can practice more labs in LabEx to improve your skills.