Check for inf - Objective-C

Question

What is the method for testing whether a double (or integer) is infinity, for example when 1/0 operation is performed?

isfinite(n) does not seem to work.

Answer 1

You may check

if(d == INFINITY) {} 

or

if(d > DBL_MAX) {} 

INFINITY is a constant float expression defined in math.h representing positive infinity;
DBL_MAX is a constant defined in float.h representing the largest double that can be represented.

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