I continued working through the NSNumber class and the methods it entails. There is some things to know but I am still unsure why I shouldn't just use the basic C data type. Supposedly I can't pass basic data types to an NSArray object (whatever that means).
Learned about mutability and immutability. There is more to read about this because I am not sure why I can assign s string to str1, and be told it is immutable, but still be able to manipulate the string. I will read tomorrow why this is so - already started it but am looking forward to finishing it.
The new Objective C book is shipping today. Will look forward to reading more about C once I get it.
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