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Answer Posted / Parvez Aalam
In Objective-C, both String and NSString are used to represent text. However, they have some differences:n1. String: It is a C-based Foundation framework class, which is not object-oriented and has no methods or properties for common string operations like length, substring, etc. On the other hand, it is more efficient due to being C based.n2. NSString: It is an Objective-C runtime class, which provides many useful string handling capabilities such as conversion, comparison, searching, and mutation. However, it is less efficient than String because it is object-oriented.
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