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I don’t understand why this doesn’t work:
[abc = ([def intValue] - 71) * 6];
‘*’ should be the viable way of doing multiplication and ‘abc’ is defined as an NSInteger. (‘def’ is an NSString)
Use e.g. the following instead:
Not everything in Objective-C is of class-type, e.g.:
NSIntegerNSUIntegerNSPointI also don’t know where you got that idea of doing the assignment inside the square brackets in the first place – i strongly recommend to read through the Introduction to The Objective-C Programming Language.