How to get the fractional part of a number in apex

Question

I need to get the number after de decimal point. For example I have:

344.567

And I need to get in a variable 567.

I've tried the next:

decimal d=43.3432332343344;

String s = String.valueOf(aa);

String[] arrayDecimal = s.split('.');

But the result is an empty array. How can I do this? Is there any way to get this?

Answer 1

In addition to the other answer, you can also use String.subStringAfter here as below (there could still be other ways to manipulate the string).

Decimal d = 43.3432332343344;
String s = String.valueOf(d); // assuming you meant to use d here
String afterDecimal = s.substringAfter('.');

Answer 2

You don't need to use String conversion at all to obtain the fractional part of a Decimal.

Decimal d = 5.6;

System.debug(d - d.round(System.RoundingMode.DOWN));

0.6

Decimal d = -5.6;

System.debug(d - d.round(System.RoundingMode.DOWN));

-0.6

Answer 3

String#split wants a Regular Expression. "." matches "any character." You'll need to "escape" the "." to have it work as you expect:

decimal d=43.3432332343344;
String s = String.valueOf(d);
String[] arrayDecimal = s.split('\\.');

Answer 4

Math.abs(d - d.intValue());

d = -7.81 returns 0.81

d - d.intValue();

d = -7.81 returns -0.81

But if you just want the string 81 - the fractional digits, then @sfdcfox answer is the way to go.