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Objective C: How do i find out if a number is divisible by another number?

Answer 1

+10 A:

Assuming you're dealing with integers, use the modulus function:

if ((a % b) == 0) {
  // A is divisible by B
} else {
  // A isn't divisible by B
}

David Knell 2010-08-12 12:44:01

Not working, i've tried if ((1 % 2) == 0) { NSLog(@"1 is divisible by 2"); } else { NSLog(@"1 is NOT divisible by 2"); }

Daniel 2010-08-12 12:47:27

+1 - good old classic C language! :-)

Pablo Santa Cruz 2010-08-12 12:48:49

@Daniel: And what does that result give you? Divisible or NOT Divisible?

Robin Day 2010-08-12 12:49:28

@Robin Nvm fixed it :)

Daniel 2010-08-12 12:50:59

Also how would i generate a random number that IS divisible by a certain number?

Daniel 2010-08-12 12:51:51

By generating a random number and multiplying it by the number you wish the final result to be divisible by?

Stephen 2010-08-12 12:55:04

Right, and 1 isn't divisible by 2 (you can't fit 2 into 1 an exact number of times, you can only fit it in half a time). On the other hand, 2 *is* divisible by 1

Gareth 2010-08-12 13:01:15

@Stephen: Awesome answer!!

Robin Day 2010-08-12 13:11:04

@Robin Day: I'm not sure if that's sarcasm, but I'll assume not and just go with thanks! =D

Stephen 2010-08-12 13:23:14

Black Frog 2010-08-15 14:37:07

Answer 2

+1 A:

I'm not a objective c programmer, but in general, just checking if A mod B = 0 should do it... won't it work in OC?

cheers.

flpgdt 2010-08-12 12:44:46

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Objective C: How do i find out if a number is divisible by another number?

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