You must specify a return data type in the procedure declaration to define the type of variable that is being returned to the calling procedure by the Function procedure.

An int must be explicitly cast to which of the following?

a) float b) double c) sbyte d) None of the above.

Why is this?

You have to #include as well as #include when you use a line of code such as ``` cout << setw(8) << 123456 << endl; ``` but not have to #include when you do the exact equivalent thing in ``` cout.width(8); cout << 123456 << endl; ```