Basic Java : fractions rounded to 0

Question

When I have a fraction for example (5 / 6) then Java will just round this to 0.

For example:

System.out.println(1-(1/2));

This prints out 1 instead of 1/2 ie 0.5.

How can I tell Java that these should be floats or doubles instead of rounded to integers?

Most children learn integer division in primary school but many seem to forget it. In Java, C, C++ etc you need to use a floating point value (or cast) to say it is not an integer. — Peter Lawrey, Jan 25 '15 at 09:01

score 3 · Accepted Answer · answered Jan 25 '15 at 08:56

3

You explicitly use a double literal :

System.out.println(1-(1.0/2));

Or you cast one of the number to a double.

answered Jan 25 '15 at 08:56

Eran

1 Answers1