How to check if number is divisible by a certain number?

java division
coder_For_Life22 picture coder_For_Life22 · Nov 24, 2011 · Viewed 150.6k times · Source

I am using AndEngine to add sprites to the screen and come across using the movemodifier method.

I have two integers MaxDuration and MinDuration;

What i want to do is when the user gets to a score of a certain increment.

Like for example.. when the user gets to 20(the integer changes) when the user gets to 40(the integer changes). So basically count by 20 and every time the score meets a number divisible by 20 the integer's change. I hope this makes sense.

Is there any method or way to do this? I have an UpdateTime handler that can check the score just about every second.

Any ideas?

Answer

Cristian picture Cristian · Nov 24, 2011 
n % x == 0

Means that n can be divided by x. So... for instance, in your case:

boolean isDivisibleBy20 = number % 20 == 0;

Also, if you want to check whether a number is even or odd (whether it is divisible by 2 or not), you can use a bitwise operator:

boolean even = (number & 1) == 0;
boolean odd  = (number & 1) != 0;

Related questions

Simple division in Java - is this a bug or a feature?

I'm trying this simple calculation in a Java application: System.out.println("b=" + (1 - 7 / 10)); Obviously I expect the output to be b=0.3, but I actually get b=1 instead. What?! Why does this happen? If I write: System.out.println("b=" + (1 …

Read More
How do I divide so I get a decimal value?

I want to know how to get remainder and quotient in single value in Java. Example: 3/2 I should get value as 1.5. If I use the / operator I get only the quotient. If I user the % operator I get only the …

Read More
Integer division in Java

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 …

Read More