Functions Functions are sets of statements that typically perform operation or compute value. They can help to make programs more accessible and usable for non-programmers e.g. create function that allows user to type "go forward" and move a robot forward. Modules -Functions can be split up into modules, "divide and conquer" -Each module has specific purpose, can be written and tested separately -Smaller than complete solution, therefore testing is easier -Can be used in new problem solutions without being retested -Reduces overall length of program -Allows for increased collaboration; modules can be worked on in parallel Debugging Longer Programs Use a compiler that gives meaningful information about errors. Adding comments around some sections of code can allow for better focus on other parts of the program. Test complicated functions by themselves. Programmer Defined Functions Execution of program always begins with main function. Additional ...