Data Type and format specifier

DATA Types Objective supports all data type which are in c. Similar to c (bool) Objective C has  extra data type is BOOL used specially in COCOA. BOOL is typedefed to signed char . which require 8 bit to store. Some time in c non zero value is consider as true so here take care if u are assigning nonzero value say 0x1230 to BOOL it will get last...

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Introduction in Objective C

History Steve jobs started NextStep to create Good UI on unix OS with Objective c language. When apple  acquired Nextstep renamed to Cocoa and brought same on Macintosh. Objective C is superset of C. Objective C  is some extra feature addition on top of C. Apple has provided XCode as IDE for  objective c. 1.Hello...

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