PT1420 Unit 4 Assignment 1 – Homework
How do modules help you to reuse code in a program? If a operation needs to be performed in several places, the same module can be called and re-used cutting down on unnecessary code. 2. Name and describe the two parts that a module definition has in most languages. The two parts are a header and a body 3. When a module is executing, what happens when the end of the module is reached? It jumps back to the part of the program that called it. This is known as the return point 4. What is a local variable? What statements are able to access a local variable? A local variable is declared inside a module and cannot be accessed by statements that are outside the module. 5. In most languages, where does a local variable’s scope begin and end? Usually begins at the variables declaration and ends at the end of the module 6. What is the difference between passing an argument by value and passing it by reference? Passing an argument by value copies the data from the variable but does not change the original data. Passing a variable by reference will overwrite the existing data at that reference point in memory. 7. Why do global variables make a program difficult ot deb
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