Why does int exp1 = 14/20*100; equals '0' in java?

Question

I\'m trying to do some basic math and it keeps popping up as 0. I\'m sure it has to do with it being an int but I don\'t know how to work around it

Answer 1

That's integer division.

To get non-integer results, use doubles instead.

Answer 2

Your result is being cast as an int, so you are losing precision.

Try

double exp1 = 14/20.0*100;

Answer 3

You can change it to 14*100/20 - and then it will give what you want.

I.e. change the sequence of operations (14/20 is 0)

Answer 4

This is not special to blackberry, it's standard java behaviour.

This is because you're doing integer math:

int subexpr1 = 14 / 20; // 0
int subexpr2 =  subexpr1 * 100; // 0

Use a double instead or change the order

int expr1 = (int) 14.0/20 * 100; // Very small possibility of rounding errors
int expr2 = 14 * 100 / 20; // Will ignore fraction parts