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iOS Objective-C Basics (Retired) Beyond the Basics Arrays

Posted by Fred Lawton
Fred Lawton
5,904 Points

Memory Address units?

Is this video correct? Since an int is say 2 bytes, then shouldn't the memory addresses for a 3 element int array be like 1000, 1002, and 1004? I guess I'm assuming the memory address is in units of bytes. Regardless of the specific units, this video seems to suggest that the memory address range of an array of 3 ints would be the same as an array of 3 doubles.

1 Answer

Amit Bijlani
STAFF
Amit Bijlani
Treehouse Guest Teacher
Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

The example was simplistic to depict subscripting to access individual elements in an array. Each memory address does not represent bytes allocated. I didn't want to get into memory allocators because that is a lot more complicated. There are several algorithms on how memory is allocated which varies based on architecture and operating system.