This is one of the most obvious and important differences between Maple and C. Maple lets you to enter a command, hit Enter, and see the results right then. You don't have to ``plan ahead'' or decide upon all of your commands ahead of time. But when you use C, you have to plan ahead by writing a complete program before the computer will carry out any of your commands.
Obviously, Maple is easy to use and that is a strength. But the ability to write programs is also a strength. Maple allows you to write programs; C require you to write programs.