how to determine the multiples of numbers in java

Question

read 2 numbers and determine whether the first one is a multiple of second one.

Answer 1

A number x is a multiple of y if and only if the reminder after dividing x with y is 0.

In Java the modulus operator(%) is used to get the reminder after the division. So x % y gives the reminder when x is divided by y.

Answer 2

Given that this is almost certainly a homework question...

The first thing you need to think about is how you would do this if you didn't have a computer in front of you. If I asked you "is 8 a multiple of 2", how would you go about solving it? Would that same solution work if I asked you "is 4882730048987" a multiple of 3"?

If you've figured out the math which would allow you to get an answer with just a pen and paper (or even a pocket calculator), then the next step is to figure out how to turn that into code.

Such a program would look a bit like this:

• Start
• Read in the first number and store it
• Read in the second number and store it
• Implement the solution you identified in paragraph two using the mathematical operations, and store the result
• Print the result to the user.

Answer 3

if (first % second == 0) { ... }