Questions and Answers
What is the purpose of abstraction in computational thinking?
To simplify complex systems by focusing on essential features
What is the sequence of steps in an algorithm?
Input, Processing, Output
What is the purpose of variables in a program or algorithm?
To store and manipulate data
What is the main difference between a while loop and a for loop?
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What is the purpose of casting data types during input?
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Study Notes
Computational Thinking
- Abstraction: identifying essential features by removing unnecessary details
- Decomposition: breaking down complex problems into smaller, manageable parts
- Pattern Recognition: identifying similarities and relationships between ideas or objects
Algorithms
- Definition: a step-by-step procedure for solving a problem or achieving a task
- Representation: flowcharts, pseudocode, and programming languages
- Flowchart components:
- Shapes: rectangles (process), diamonds (decision), parallelograms (input/output)
- Arrows: direction of flow
- Identifying inputs, processes, and outputs in an algorithm
Python Programming Fundamentals
Sequence
- Following a series of steps in a specific order
Selection
- Using if-else statements to make decisions in a program
- Identifying selection in an algorithm
Iteration
- Repetition in a program using:
- While loops: repeating until a condition is met
- For loops: repeating for a specified number of times
- Including necessary elements in a loop
Variables
- Purpose: storing and manipulating values in a program
- Assigning and changing variable values
Data Types
- Main data types: numbers, text, booleans, etc.
- Casting data types during input to ensure correct processing
