JavaScript multiplying by 100 giving weird result [duplicate]

Answer 1

you should use .toFixed()

FIDDLE

var a =  0.0532;
var b =  a * 100;
b.toFixed(2);     //specify number of decimals to be displayed

Answer 2

This is not an error.

Javascript is trying to represent 5.32 with as much precision as possible. Since computers don't have infinite precision, it picks the closest number it can: 5.319999999999999.

An error margin of 0.0000000000001 should be more than acceptable, no?

You can always round the number to less decimal digits, or (if your problem is visual) use toFixed() to create a rounded human-readable string:

number = 123.4567
number.toFixed(2)
> '123.46'