Number to Fixed-Point Notation Without Trailing Zeros

Introduction

In this lab, we will explore how to format a number using fixed-point notation without trailing zeros in JavaScript. We will use the Number.prototype.toFixed() method to convert the number to a fixed-point notation string, followed by Number.parseFloat() to remove any trailing zeros. Finally, we will use a template literal to convert the number to a string. This lab is designed to help you gain a better understanding of how to format numbers in JavaScript using fixed-point notation.

Converting Numbers to Fixed-Point Notation

To convert a number to fixed-point notation without trailing zeros, follow these steps:

1. Open the Terminal/SSH and type node to start practicing coding.
2. Use Number.prototype.toFixed() to convert the number to a fixed-point notation string.
3. Use Number.parseFloat() to convert the fixed-point notation string back to a number, removing trailing zeros.
4. Use a template literal to convert the number to a string.

Example code:

const toOptionalFixed = (num, digits) =>
  `${Number.parseFloat(num.toFixed(digits))}`;

You can test the function with different inputs:

toOptionalFixed(1, 2); // '1'
toOptionalFixed(1.001, 2); // '1'
toOptionalFixed(1.5, 2); // '1.5'

Summary

Congratulations! You have completed the Number to Fixed-Point Notation Without Trailing Zeros lab. You can practice more labs in LabEx to improve your skills.