None of the answers I see at the moment correctly convert -0 to "-0". Note that -0..toString() might appear to work, but it's working by converting 0 to "0", then applying the minus sign to it, actually …

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., …

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.

Below is a very irritating example of how JavaScript can get you into trouble: If you just try to use parseInt() to convert to number and then add another number to the result it will concatenate …

You need to add " (/\d+/g)" which will remove all non-number text, but it will still be a string at this point. If you create a variable and "parseInt" through the match, you can set the new variables to …

20 aug. 2009 · Does anyone know how can I check whether a variable is a number or a string in JavaScript?

25 mei 2010 · I am trying to print an integer in JavaScript with commas as thousands separators. For example, I want to show the number 1234567 as "1,234,567". How would I go …

26 okt. 2009 · How to find a number in a string using JavaScript? Asked 16 years, 2 months ago Modified 2 years, 6 months ago Viewed 206k times

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

25 sep. 2014 · Sort of trying out some quirks in javascript: First I did console.log("5" + 1); This prints 51, this is normal right, both number and string have a + operator, but since string is the …