To use the strlen function in a program, you must #include A) . B) . C) . D) . E) None of the above

Name: To use the strlen function in a program, you must #include A) <strlen>. B) <iostring>. C) <cstring>. D) <stringlib>. E) None of the above
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The strlen function is a part of the string functions provided in the C Standard Library's cstring header file. Therefore, we need to include <cstring> in our program to use the strlen function. Options A, B, D are not valid header files in C.

To Use the Strlen Function in a Program, You Must