There are two main ways to convert a string to a number in JavaScript. One way is to parse it and the other way is to change its type to a Number. All of the tricks in the other answers (e.g., unary plus) …

This Stack Overflow thread discusses methods to format numbers as currency strings in various programming languages.

May 10, 2010 · All numbers in JavaScript are actually IEEE-754 compliant floating-point doubles. These have a 53-bit mantissa which should mean that any integer value with a magnitude of approximately …

To check if a variable (including a string) is a number, check if it is not a number: This works regardless of whether the variable content is a string or number.

Oct 7, 2009 · How can I generate random whole numbers between two specified variables in JavaScript, e.g. x = 4 and y = 8 would output any of 4, 5, 6, 7, 8?

Aug 20, 2008 · What's the cleanest, most effective way to validate decimal numbers in JavaScript? Bonus points for: Clarity. Solution should be clean and simple. Cross-platform. Test cases: 01. …

I have the following JavaScript syntax: var discount = Math.round(100 - (price / listprice) * 100); This rounds up to the whole number. How can I return the result with two decimal places?

Oct 8, 2010 · Provides solutions for determining if a number is a float or integer in programming.

Nov 21, 2008 · JavaScript has two number types: Number and BigInt. The most frequently-used number type, Number, is a 64-bit floating point IEEE 754 number. The largest exact integral value of this type …

How do parseInt() and Number() behave differently when converting strings to numbers?