Java : how to get correct result?

Question

In java:

double b = 1234 / (1234+1500);

result is:

0.0

why?

How to get correct result?

score 1 · Answer 1 · answered Apr 01 '15 at 12:17

1

double b = 1234D / (1234D + 1500D)

answered Apr 01 '15 at 12:17

Steve

but i am using an local variable to give input value... how to implement it – Apr 01 '15 at 12:26
I only answered your original question. To be honest, I would not use doubles for arithmetic. Use BigDecimals and parse your inputs to them – Steve Apr 01 '15 at 12:30

score 0 · Accepted Answer · answered Apr 01 '15 at 12:04

0

just make one of the operand double/float -

double b = (double) 1234.0/(1235+1500);

Here casting is not required.

The rules benind: if one of the operand is double/float (here 1234.0) the other is promoted to double/float.

answered Apr 01 '15 at 12:04

Razib

score 0 · Answer 3 · answered Apr 01 '15 at 12:05

0

You get 0.0 because java will be an integer devision. To get the correct result you have to cast at least on operator to double.

double b = ((double)1234) / (1234+1500)

answered Apr 01 '15 at 12:05

Jens

@VigneshRajendran if it works feel free to accept and/or upvote my answer. – Jens Apr 01 '15 at 12:40

3 Answers3