Question

I want make a function to include in my code to calculate percentages.

In Php, it’s :

function percent(a,b){
  return a/b*100;
}

In Objective C, I don’t know. I tried:

-(void)percent(a,b){
   return a/b*100;
}

But there are 2 errors. Could you me explain how to make it work?

Thank you for you help

Answer 1

The more correct way to do this will be:

- (float)precentageByDevidingFloat:(float)a byFloat:(float)b {
  float returnValue = 0; 
  if (b != 0)
    returnValue = a / b * 100;

  return returnValue;

}

This way you use a more correct naming convention , you actually return a float and your safe in case some one gave you the value 0 in B.
(which should be covered by documentation)