Sub Programs

Question 1

2 types of sub programs

Answer 1

Procedures
Functions

Question 2

Procedures

Answer 2

Set of instructions stored under 1 name

Question 3

Functions

Answer 3

Set of instructions stored under 1 name
Always return a value

Question 4

What are procedures and functions used for

Answer 4

To repeat a set of instructions throughout the program

Give program more structure + reliability

Question 5

What are parameters?

Answer 5

Special variables used to pass values into a sub program
You can specify a name, data type, a default value

Question 6

What are arguments?

Answer 6

The actual values that the parameters take when the sub program is called

Question 7

What do all variables have?

Answer 7

Scope - tells you which parts of the program the variable can be used in

Question 8

Local Variables

Answer 8

Only used within the structure that they are declared
Have a local scope

Question 9

Global Variables

Answer 9

Can be used anytime after they are declared
Have a global scope

Question 10

Where are local variables declared?

Answer 10

In sub program

Question 11

Advantages of Local Variables

Answer 11

Do not affect anything outside the sub program

Question 12

Disadvantages of Global Variables

Answer 12

Hard to keep track of its value in large programs