Unit5-02: Functions with Same Type Parameters

Learning Outcome

At the end of this lesson, you will be able to:

A3.2 write subprograms (e.g., functions, procedures) that use parameter passing and appropriate variable scope (e.g., local, global), to perform tasks within programs.
understand and create your own functions with parameters

What is the purpose of a function in programming?
What are 2 built-in functions in functions in Python that you know of?
Create a function called calc_area() in Python that asks the user for the length and width of a rectangle, as decimals. It then calculates and displays the area. Don't worry about error checking.
Do the above question in C++.

from the online book Computer Based Problem Solving by Patrick Coxall, read:
- Functions with Parameters
Parameter:
- a variable or value that is passed to a function so it can use it to perform a specific task
- when writing a function, you have to tell it what the parameters are
- parameters are written in brackets after the function name
Argument:
- the variable that is passed to the function in the function call
- it is important that the argument name is different than the parameter name!
Pass by Value:
- a copy of the data is made and the copy is passed to the function
- since the data is a copy, any changes to it are not reflected in the original variable
- the original variable CANNOT be modified
Pass by Value vs Pass by Reference in C++

Create a program called "Area of Triangle" that has a function that calculates the area of a triangle.
- Name the function "calc_area()" in Python and "CalcArea()" in C++
- It will accept 2 parameters, base and height (cm), as decimals
- It will calculate the area, as a decimal, and print out the results
- Ensure the main() function catches any "bad" user input so that only "valid" input is passed to the function.

in groups of 2, do the following on the board for today's daily assignment:
- Top-Down Design
- Flow Chart
- Pseudocode
- Test Cases

complete the Daily Assignment section in Hãpara Workspace for this day
- if Hãpara is not working, make a copy of this document
- move it to your IMH-ICS folder for this course