JavaScript how to make the amount

Learn how to calculate sums in Javascript with an easy example! Calculate the sum of two numbers with the "+" operator.

JavaScript to Make an Amount

In JavaScript, you can use the Number() constructor to make a number object out of a given amount. For example, if you wanted to make an amount of 123.45, you could use the following code:

let amount = new Number(123.45);

The Number() constructor can also be used to convert a string into a number. For example, if you had a string with the value of "123.45", you could use the following code to get a number object with this value:

let amount = new Number("123.45");

Once you have the number object, you can use the toFixed() method to set the number of decimal places. For example, if you wanted to have 2 decimal places, you could use the following code:

let amount = new Number(123.45);
let amountWithDecimals = amount.toFixed(2);
// amountWithDecimals is now 123.45

When you use the toFixed() method, the amount will be returned as a string, so you may need to convert it back to a number using the Number() constructor again. For example, if you wanted to convert the string "123.45" back to a number, you could use the following code:

let amountString = "123.45";
let amountNumber = new Number(amountString);
// amountNumber is now 123.45

Once you have the amount in a number object, you can use the toFixed() method again to format it as needed. For example, if you wanted to have 3 decimal places, you could use the following code:

let amount = new Number(123.45);
let amountWithDecimals = amount.toFixed(3);
// amountWithDecimals is now 123.450

Once you have the amount in the desired format, you can use it in your application as needed. For example, if you wanted to display the amount in an HTML element, you could use the following code:

let amount = new Number(123.45);
let amountWithDecimals = amount.toFixed(2);
let htmlElement = document.getElementById('amount');
htmlElement.innerHTML = amountWithDecimals;