Unit #3-03

Learning Outcome

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

• create test cases for your program

Review

• storyboards and flowcharts

Lesson

• ensuring that you know what the output from your program should be, even before you write any code is critically important

  • how can you know your program is working correctly is you can not test it!

  • but is it really that important? (see video below: ↓)

• using π

  • it turns out that using π is so common that instead of typing 3.1415... in most programming languages have a shortcut

    • in JavaScript, you type: Math.PI

Activity

• do demo of test cases for area of a square problem (see below: ↓)

Daily Assignment

• create a web page that will do the following:

  • calculates the volume of a sphere

    • ask the user to enter the radius of the sphere

      • it can be a decimal number!

    • now create 3 test cases for this problem

  • see screenshots below: ↓

Extra

• • create the above program in PHP

Area of square test cases:

• if l = 5

     area = l²

     area = 5²

     area = 25

• if l = 7

     area = l²

     area = 7²

     area = 49

• if l = 15

     area = l²

     area = 15²

     area = 225

Human Mistakes