Integer division in Java

java math int division
MadMonty picture MadMonty · Jun 13, 2016 · Viewed 87.1k times · Source

This feels like a stupid question, but I can't find the answer anywhere in the Java documentation. If I declare two ints and then divide them, what exactly is happening? Are they converted to floats/doubles first, divided, then cast back to an integer, or is the division "done" as integers?

Also, purely from experimentation, integer division seems to round the answer towards zero (i.e. 3/2 = 1 and -3/2 = -1). Am I right in believing this?

Answer

Andrei Bardyshev picture Andrei Bardyshev · Jun 13, 2016

They are being divided in integer arithmetics. So dividing integer a by integer b you get how many times b fits into a. Also a % b will give you a remainder of a division. So (a / b ) * b + a % b = a

Related questions

Java - How to check if a division is an integer or a float?

Couldnt think of a better title. Well the problem is: I have the "int i", it can be any value. my goal is to transform the "int i" to the closest number divisible by 16. For example, I got i = 33. Then …

Read More
Java Round up Any Number

I can't seem to find the answer I'm looking for regarding a simple question: how do I round up any number to the nearest int? For example, whenever the number is 0.2, 0.7, 0.2222, 0.4324, 0.99999 I would want the outcome to be 1. So far …

Read More
How to find correlation between two integer arrays in java

I am searching a lot but could not find exactly what i need till now. I have two integer arrayas int[] x and int[] y. I want to find simple linear correlation between these two integer arrays and it should …

Read More