Function Calls
		• The following C++ statement has a call to the function Square in it:     cout << “27 squared is” << Square(27); • The function call consists of the symbols      Square(27)    and may also be called a function invocation. • The computer temporarily puts the main function on hold and starts the Square function running. • When the Square function has finished doing its work, the computer goes back to main and picks up where it left off.