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iOS Objective-C Basics (Retired) Fundamentals of C Anatomy of a C program

Rodrigo Chousal
Rodrigo Chousal
16,009 Points
Posted by Rodrigo Chousal
Rodrigo Chousal
16,009 Points

Return 0

Is there a difference if you write return 15, or any number for that matter at the end of the main ( ) function?

1 Answer

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

return 0 signifies successful exit. returning anything else (nonzero) usually signifies failed exit.

Rodrigo Chousal
Rodrigo Chousal
16,009 Points
Rodrigo Chousal
Rodrigo Chousal
16,009 Points

But does it change anything when it goes into the compiler? Or is the return just for the programmer to see?

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

it doesnt change the behavior of the program. your code will still run regardless of the return value (assuming its correct), however the return value is useful in some situations.