How to Convert Int number to Double number?

Question

Using Javascript:

How I can convert one number integer to Double Number Example:

100 -> 100.00

Answer 1

All numbers in JavaScript are doubles: that is, they are stored as 64-bit IEEE-754 doubles.

That is, the goal is not to get a "double": the goal is to get the string reprsentation of a number formatted as "YYY.XX". For that, consider Number.toFixed, for instance:

(100).toFixed(2)

The result is the string (not a "double"!) "100.00". The parenthesis are required to avoid a grammar ambiguity in this case (it could also have been written as 100.0.toFixed or 100..toFixed), but would not be required if 100 was in a variable.

Happy coding.

Answer 2

JavaScript numbers are already IEEE 754 floating point numbers (specification). If you want to format it (for output), you can use toFixed ^[MDN].