1. Programming Techniques
Keywords
Parameter, Function, Procedure, Argument, Variable, Program.
Programming Techniques
Sub Programs

2. Why use sub programs?
Objectives
BEGINNER: Define a sub program in computing.
ADVANCED:
Explain functions, procedures, parameters and arguments.
EXPERT:
Develop a program that uses a function.
Sub programs can be used to save time and simplify code. The main types of sub programs are procedures and functions. When you want your program to repeat in different places you only need to call the name of the sub program. This saves time and simplifies code by avoiding repetition of code.
Starter activity

3. Procedure
Objectives
BEGINNER: Define a sub program in computing.
ADVANCED:
Explain functions, procedures, parameters and arguments.
EXPERT:
Develop a program that uses a function.
Procedures are sets of instructions stored under one name (identifier).
Starter activity
If we call name() and input Jon it would output:
Hello Jon

4. Function
Objectives
BEGINNER: Define a sub program in computing.
ADVANCED:
Explain functions, procedures, parameters and arguments.
EXPERT:
Develop a program that uses a function.
Functions are similar to procedures but always return a value to the main program.
Starter activity

5. Parameter and Arguments
Objectives
BEGINNER: Define a sub program in computing.
ADVANCED:
Explain functions, procedures, parameters and arguments.
EXPERT:
Develop a program that uses a function.
A Parameter is a special name given to a variable that is passed into a sub function. It is worth noting that both procedures and functions can take in parameters.
An argument is the name given to the actual values when the sub program is called.
Starter activity

6. Task 90-100 = A* 80-89 – A 70 – 79 – B 60 – 69 – C <60 - Fail
Objectives
BEGINNER: Define a sub program in computing.
ADVANCED:
Explain functions, procedures, parameters and arguments.
EXPERT:
Develop a program that uses a function.
Write a function called GradeCalculator() that converts an exam result to a grade using the following boundaries:
= A*
80-89 – A
70 – 79 – B
60 – 69 – C
<60 - Fail
Starter activity
Can you create pseudo code and then write the program in python?