New course! Every coder should learn Generative AI!
Try a free lesson+ 2
Mainly the fact C is a general programming language that can be compiled to run on most systems whereas Objective-C is from Apple and used for iOS & Mac. Swift has somewhat replaced that, but if the Obj-C tools are still available/maintained there's no reason people who know them well and haven't learned Swift would immediately abandon them.
+ 5
Yes there is StudioYol
C is a general purpose programming language (procedural programming).
Objective-C is more of an high-level object-oriented programming language. (A subset of C, everything valid in C is also valid in Objective-C).