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How To Parse Float With 2 Decimal Places In JavaScript - LearnShareIT

How To Parse Float With 2 Decimal Places In JavaScript

How to Parse Float with 2 Decimal places in JavaScript

In this article, I will show you how to parse Float with 2 Decimal places in JavaScript using two standard methods that are the toFixed() method and the Math.round() function.

Parse Float with 2 Decimal places in JavaScript.

Using the toFixed() method

The toFixed() method in JavaScript is a method that is used to convert a number value to a string value and round the number to a decimal number with a specified number of decimal places.

To parse Float with 2 decimal places. Firstly, we need to use the parseFloat() function. This function will parse the input string and convert it to a number. Second, we call the toFixed() method to round the input variable to the specified decimal place.

Syntax:

parseFloat(myString).toFixed(2)

The parseFloat(myString) will convert myString to the number, and then toFixed(2) will round it to two decimal places

For instance:

let myString = 2.71828;
let myFloat = parseFloat(myString).toFixed(2);

console.log(myString + " after being parsed float with 2 decimal places is " + myFloat);
console.log("Type of myFloat is " + typeof myFloat);

Output:

2.71828 after being parsed Float with 2 decimal places is 2.72
Type of myFloat is string

By using toFixed(), we will receive a string, so if you want to receive a number instead of a string, you can use parseFloat() again.

Using the Math.round() function

The Math.round() function in JavaScript is a function of a math object. It returns the nearest integer rounded from the specified number.

Syntax:

Math.round(number)

For instance:

let myString = 2.71828;
let myFloat = Math.round(myString * 100) / 100;

console.log(myString + " after being parsed float with 2 decimal places is " + myFloat);
console.log("Type of myFloat is " + typeof myFloat);

Output:

2.71828 after being parsed Float with 2 decimal places is 2.72
Type of myFloat is number

The Math.round( myString * 100) / 100 is used to guarantee the place of the decimal. Which ensures that we will get two digits after the comma after rounding.

This way will return a numeric value, but if there is a trailing zero after the decimal point, it will be removed. For example, ‘1.10’ will become ‘1.1’.

Summary

Through this article, we have learned how to parse Float with 2 Decimal places in JavaScript using two methods. Depending on your purpose, you can choose one of the above two ways. If you want the return value to be a string, you can use the toFixed() method. If the value you want to get back is a numeric type, choose the Math.round() function. I hope you enjoy this article.

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