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iOS Swift Functions and Optionals Optionals Exercise: isDivisible function

Jens Hagfeldt
Jens Hagfeldt
16,548 Points

How to work around error when trying to divide zero by zero?

The code works fine until I enter zero both for the dividend and the divisor. But if I do that I get the EXC_BAD_INSTRUCTION error when it should return "Divisible"... Any thoughts on how to work around this?

2 Answers

Michael Hulet
Michael Hulet
47,843 Points

I'm not sure what the video says, but 0/0 is actually not divisible. Instead, it is one of the only values in mathematics that is "indeterminate"

Jens Hagfeldt
Jens Hagfeldt
16,548 Points

Thanks for your answer Michael, seems it was too long ago I had mathematics in school :)

Michael Hulet
Michael Hulet
47,843 Points

It's no problem. To be honest, I only knew it because we covered it last Wednesday in my High School Honors Algebra II class

Since we are using a Remainder Operator and not an actual division, 0/4 for example, does not return an error. 4/0 does. It does not make any sense, of course.