SistematikoProgramming Fundamentals with Python
Learn how variables, decisions, loops, and functions work together in a small Python program.
Explanation
Programming turns a solution into instructions a computer can execute. This lesson introduces variables for storing values, conditional statements for making decisions, loops for repetition, and functions for organizing reusable behavior.
Students build a grade-summary program and test it with normal, boundary, and invalid inputs. The activity emphasizes tracing program state before relying on trial and error.
Learning activities
- Trace a short program and record each variable value.
- Build a grade-summary program using a function and loop.
- Test the program with boundary and invalid inputs.
Code example
python
def average(scores):
return sum(scores) / len(scores)
scores = [88, 91, 85]
print(f"Average: {average(scores):.2f}")Knowledge check
1. What is the main purpose of a function?
- Store files
- Group reusable behavior
- Connect to Wi-Fi
Show answer
Group reusable behavior