When the computer processes the Trim method, it makes a temporary copy of the string
in memory, and then performs the necessary trimming on the copy only.
The instructions in the true path of a nested structure should not be indented within the
inner selection structure.
Every variable declared in an application has both a value and a unique address that
represents the location of the variable in the computer's internal memory.
The ReadLine method requires you to provide the file's name.