How to add float numbers using JavaScript ?

How to add float numbers using JavaScript ?

Last Updated : 31 May, 2024

Given two or more numbers the task is to get the float addition in the desired format with the help of JavaScript.

There are two methods to solve this problem which are discussed below:

Table of Content

Using parseFloat() and toFixed() method
Using parseFloat() and Math.round() method
Using Number() and Intl.NumberFormat method

Using parseFloat() and toFixed() method

Given two or more numbers, to sum up the float numbers.
Use parseFloat() and toFixed() method to format the output accordingly.

Example: This example implements the above approach.

JavaScript

let val = parseFloat('2.3') + parseFloat('2.4');
console.log("2.3 + 2.4 = " + val);

function gfg_Run() {
    console.log("2.3 + 2.4 = "
        + (parseFloat('2.3') +
            parseFloat('2.4')).toFixed(2));
}
gfg_Run()

Output

2.3 + 2.4 = 4.699999999999999
2.3 + 2.4 = 4.70

Using parseFloat() and Math.round() method

Given two or more numbers, to sum up the float numbers.
Use parseFloat() and Math.round() method to get the desired output.

Example: This example implements the above approach.

JavaScript

let val = parseFloat('2.3') + parseFloat('2.4');
console.log("2.3 + 2.4 = " + val);

function gfg_Run() {
    console.log("2.3 + 2.4 = " +
        Math.round((parseFloat('2.3')
            + parseFloat('2.4')) * 100) / 100);
}
gfg_Run()

Output

2.3 + 2.4 = 4.699999999999999
2.3 + 2.4 = 4.7

Using Number() and Intl.NumberFormat method

Given two or more numbers, to sum up the float numbers:

Use Number() to convert strings to floating-point numbers.
Use Intl.NumberFormat to format the output accordingly.

Example:

JavaScript

let val = Number('2.3') + Number('2.4');
console.log("2.3 + 2.4 = " + val);

function gfg_Run() {
    let sum = Number('2.3') + Number('2.4');
    let formattedSum = new Intl.NumberFormat('en-US', 
    { minimumFractionDigits: 2, maximumFractionDigits: 2 }).format(sum);
    console.log("2.3 + 2.4 = " + formattedSum);
}
gfg_Run();

Output

2.3 + 2.4 = 4.699999999999999
2.3 + 2.4 = 4.70

How to add float numbers using JavaScript ?

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PranchalKatiyar

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