When I divide two numbers in Java, no decimal found

Question

I write a code in Java

I have two numbers

For example

int alas  = 15;
int tinggi = 3;

When I divide those two numbers

int luas = (alas * tinggi) / 2;

I want to have 7.5 as a result, but why it keeps shown as 7.0

Because of `int` calculations. – Maroun Dec 01 '14 at 09:38 — Maroun, Dec 01 '14 at 09:38
use `float` .....or `double` – Adil Shaikh Dec 01 '14 at 09:38 — Adil Shaikh, Dec 01 '14 at 09:38
`luas` is an `int`, it can't output `7.0`... – BackSlash Dec 01 '14 at 09:38 — BackSlash, Dec 01 '14 at 09:38
*Integer division*. Use `0.5 * alas * tinggi`. – Bathsheba Dec 01 '14 at 09:39 — Bathsheba, Dec 01 '14 at 09:39

score 2 · Answer 1 · answered Dec 01 '14 at 09:38

2

Try this:

double luas = (alas * tinggi) / 2.0;

when you divide int by int you will have int result. 2.0 mean that you want to divide by double, so result will be double.

answered Dec 01 '14 at 09:38

DontRelaX

score 1 · Accepted Answer · answered Dec 01 '14 at 09:38

1

int there is no decimal places. you can use double or float.

double luas = (alas * tinggi) / 2.0;

answered Dec 01 '14 at 09:38

2

the part at the end - 2.0 - is very important, if it was just 2, then the result would have a decimal place, but it would always be 0 – Vladimir Marton May 31 '17 at 14:50

2 Answers2