Week 0 Scratch

Computer Science. Computational Thinking. Problem Solving: Inputs, Outputs. Representation: Unary, Binary, Decimal, ASCII, Unicode, RGB. Abstraction. Algorithms. Running Times. Pseudocode. Scratch: Functions, Arguments, Return Values; Variables; Boolean Expressions, Conditionals; Loops; Events; Threads.

• Lecture
  • Audio
  • Demos
    • This is CS50
  • Notes
  • Slides
    • Google Slides
    • PDF
  • Source Code
    • Index
      • Note that the chat.py example shown at the beginning of lecture is intentionally excluded here. It requires substantial environment configuration and was only done for illustrative purposes. You should not attempt to run this code yourself!
    • Studio
    • Zip
  • Subtitles
    • English
  • Transcripts
    • English
  • Video
    • English
      • CS50 Video Player
      • MP4
        • HDR
          • 360p
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          • 4K
        • SDR
          • 360p
          • 720p
          • 1080p
          • 4K
      • YouTube
    • Portuguese
      • CS50 Video Player
      • YouTube
    • Spanish
      • CS50 Video Player
      • YouTube
• Problem Set 0