TypeScript: String to Number

This article is part of my TypeScript series. Please, consider subscribing to my newsletter for tips on programming, entrepreneurship and design.

I have noticed multiple questions regarding how to convert a String value to a Number using TypeScript.

The answer is that you can convert String to Numbers just the same way than JavaScript, using parseInt("42"), parseFloat("42"), +"42" or Number("42").

const numberString: string = "42";

const number: number = parseInt(numberString);
const number: number = parseFloat(numberString);
const number: number = +numberString;
const number: number = Number(numberString);
Multiple approaches return the same number type parsing a string number

This StackOverflow answer compares a multitude of alternative methods:

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