Number

Number values represent floating-point numbers like 37 or -9.25.

The Number constructor contains constants and methods for working with numbers. Values of other types can be converted to numbers using the Number() function.

Numbers are most commonly expressed in literal forms like 255 or 3.14159. The lexical grammar contains a more detailed reference.

A number literal like 37 in JavaScript code is a floating-point value, not an integer. There is no separate integer type in common everyday use. (JavaScript also has a BigInt type, but it’s not designed to replace Number for everyday uses. 37 is still a number, not a BigInt.)