What is the process of changing a number to the double data type in JavaScript or TypeScript?

Within a single input field, users can enter various numbers such as 12, 12.1, 12.30, and 12.34. The challenge is to pass this value in a service call where only the value can be sent as a number but with two decimal points.

let a = input //a will be a type of number
let b = a.toFixed(2) //b will be type of string
let c = Number(b) //it will automatically cut unwanted '0'
console.log(c);

EXAMPLE

//input is 12
a=12
b="12.00"
c=12

//input is 12.30
a=12.30
b="12.30"
c=12.3

I am searching for a method that allows me to input a value as a number and receive an output with two decimal points.

Answer №1

To ensure a number is consistently displayed with two decimal places, you can follow the method outlined below. This approach will round all numbers to two decimal places, even for doubles.

function displayTwoDecimalPlaces(inputNumber){
    return parseFloat(Math.round(inputNumber * 100) / 100).toFixed(2);
}

let result = displayTwoDecimalPlaces(10);

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