Unit #1-02

Learning Outcome

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

• create an application that uses complex math and "large" variable types

• prevent invalid input from the user

Review

• the importance of a good design BEFORE you start coding!

• the importance of checking the input

  • try ... catch statements

    • or more likely, a bunch of if statements!

• review how bun-promptx works:

  • it returns a dictionary

  • after getting the item out, it is actually of type (string | null)!

Lesson

• read "Structured Problem Solving", Chapter 2, Computer Based Problem Solving

  • read up to and including "Sequence"

Daily Assignment

• read the following problem:

  • Albert Einstein's famous equation E = mc² gives the amount of energy (in Joules) released when an object of a certain mass (in kg) is converted to energy. If the speed of light (c) is 2.998x10⁸ m/s  write a program that will allow the user to enter the mass of an object and then sees how much energy could be released from that object.

• use a try ... catch (or if statement) to ensure the user is entering in a number and not text or nothing!

  • this might be useful:

    • read "Try ... Catch"

Extra

• do the above in a second language