JS number converted to float, n decimal

The variables in JavaScript are weak types, all variables are declared as Var, and in the process of type conversion is not as convenient as Java, it is through parseint (variable), parsefloat (variable) and other methods to do type conversion. Note: There is no parsedouble (variable) type conversion, because in JavaScript there is no single-precision float and double-precision doubles, everything has a decimal variable is considered to be a float, so to take the fractional n bits, Use the method tofixed (n) to get it.

For example:
var f=2.56556;
F.tofixed (2);

It is possible to obtain the 2 bits after the variable f decimal, and if it is not a float type, a type conversion (parsefloat (variable name)) is required.

JS number converted to float, n decimal