User Input & Type Casting
Learn how to get user input, validate it, and convert between data types to create interactive Python programs.
Learn how to get user input, validate it, and convert between data types to create interactive Python programs. This hands-on tutorial focuses on practical implementation of user input & type casting concepts.
User Input & Type Casting
Interactive programs need user input! In this lesson, you will learn how to get input from users, validate it, and convert between different data types.
Getting User Input
The input() function pauses your program and waits for the user to type something.
Type Casting (Conversion)
Since input() always returns a string, you often need to convert it.
Handling Errors (Try-Except)
What if the user types "abc" instead of a number? The program crashes! We use try-except to handle this gracefully.
Input Validation Patterns
1. The "Keep Asking" Loop
This is a common pattern to ensure you get valid input.
Practical Examples
1. Mad Libs Game
A classic word game where you fill in the blanks.
2. Tip Calculator
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Quiz
Quiz
Question 1 of 5What type does input() return?
Key Takeaways
✅ input() gets text from the user (always a string).
✅ Use int() and float() to convert strings to numbers.
✅ Use try-except to handle invalid input gracefully.
✅ Validate input logic (e.g., age cannot be negative).
What's Next?
In the next lesson, we'll learn how to make decisions with Conditional Statements (if, elif, else).
Keep coding! 🚀