Section 3.14.1 - Libraries (Ethan Tran)

Learning Objective

To be able to select appropriate libraries and/or existing code to use in the creation of new programs.

College Board Essential Knowledge

  • A software library contains procedures that can be used in the creation of new programs.
  • Existing segments of code can come from internal or external sources, ie. libraries or previously written code.
  • The use of libraries simplifies the task of creating complex programs.
  • Application program interfaces (APIs) are specifications for how the procedures in a library behave and can be used.
  • Documentation for a library or API is necessary in understanding the key behaviors provided by the API/library and how to utilize them in your work.

Defining a Library

  • A library is a collection of code from an external source that can be used to add functionality to a program.
  • Libraries are very useful, as they can be used to save time and effort in the development process.

- Libraries are usually included in a program using a special keyword called " ." This keyword tells the program to look for the library and use its code.

Why isn't the answer B?

  • This because when you are saying equal to 50, you are saying only when this one number shows up the output will be yes.
  • You want it to come up 50 percent of the time not just when that one number shows up.

Hacks 3.15.2

  • For your hacks you need to create a random number generator that will simulate this situation:

  • There is a spinner divided into eight equal parts. 3 parts of the spinner are green, two parts are blue, one part is purple, one part is red, and one part is orange. How can you simulate this situation using a random number generator.

  • Also answer this question: What numbers can be outputted from RANDOM(12,20) and what numbers are excluded?

Hacks Summary

Hacks 3.14.1

  • Write a program that uses a library/libraries in any sort of manner.
  • Explain your work/code

Hacks 3.15.1

  • Write a few lines of code that implements the import function

  • Define what an import random function do

  • List a few other things that we can import other than random

Hacks 3.15.2

  • For your hacks you need to create a random number generator that will simulate this situation:

  • There is a spinner divided into eight equal parts. 3 parts of the spinner are green, two parts are blue, one part is purple, one part is red, and one part is orange. How can you simulate this situation using a random number generator.

  • Also answer this question: What numbers can be outputted from RANDOM(12,20) and what numbers are excluded?