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Computer Science Principles
  • Introduction
  • Overview
  • Course at a Glance
  • Course Exam Description
  • Create Performance Task
  • Reference Sheet
  • Resources
  • Big Idea 1
    • 1.1 Collaboration
    • 1.2 Program Function and Purpose
    • 1.3 Program Design and Development
    • 1.4 Identifying and Correcting Errors
  • Big Idea 2
    • 2.1 Binary Numbers
    • 2.2 Data Compression
    • 2.3 Extracting Information from Data
    • 2.4 Using Programs with Data
  • Big Idea 3
    • 3.1 Variables and Assignments
    • 3.2 Data Abstraction
    • 3.3 Mathematical Expressions
    • 3.4 Strings
    • 3.5 Boolean Expression
    • 3.6 Conditionals
    • 3.7 Nested Conditionals
    • 3.8 Iteration
    • 3.9 Developing Algorithms
    • 3.10 Lists
    • 3.11 Binary Search
    • 3.12 Calling Procedures
    • 3.13 Developing Procedures
    • 3.14 Libraries
    • 3.15 Random Values
    • 3.16 Simulations
    • 3.17 Algorithmic Efficiency
    • 3.18 Undecidable Problems
  • Big Idea 4
    • 4.1 The Internet
    • 4.2 Fault Tolerant
    • 4.3 Parallel and Distributed Computing
  • Big Idea 5
    • 5.1 Beneficial and Harmful Effects
    • 5.2 Digital Divide
    • 5.3 Computing Bias
    • 5.4 Crowdsourcing
    • 5.5 Legal and Ethical Concerns
    • 5.6 Safe Computing
  • Code
    • Week 10
    • Week 11
    • Week 12
    • Week 13
    • Week 14
    • Week 15
    • Week 16
    • Week 17
    • Week 18
    • Week 19
    • Week 20
    • Week 21
    • Week 22
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  • Enduring Understanding
  • Learning Objective
  • Essential Knowledge

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  1. Big Idea 3

3.14 Libraries

Enduring Understanding

Programmers break down problems into smaller and more manageable pieces. By creating procedures and leveraging parameters, programmers generalize processes that can be reused. Procedures allow programmers to draw upon existing code that has already been tested, allowing them to write programs more quickly and with more confidence.

Learning Objective

Select appropriate libraries or existing code segments to use in creating new programs.

Essential Knowledge

A software library contains procedures that may be used in creating new programs.

Existing code segments can come from internal or external sources, such as 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 an API/library is necessary in understanding the behaviors provided by the API/library and how to use them.

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