Скачать или смотреть Python for Beginners: Solving the String Problem with Type Conversion (int, float, str)

Ever written a Python script where you add two numbers from a user, like 15 + 6, only to get "156" as the result?. This is one of the most common hurdles for new Python programmers, and this video will show you exactly why it happens and how to fix it permanently.
We'll explore the crucial topic of data type conversion in Python. You'll learn that every value in Python has a data type, like integer, float, or string, which defines what you can do with it. The problem often starts when you take user input, but the solution is a powerful and simple technique called explicit type conversion, or type casting.

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WHAT YOU WILL LEARN:
• The Root of the Problem: Understand why adding two numbers that are secretly strings results in "string concatenation" (joining them together) instead of a mathematical sum.
• Implicit vs. Explicit Conversion: Learn the difference between when Python automatically converts types for you (like int to float to avoid losing data) and when you must do it yourself.
• Mastering Explicit Conversion Functions: We'll walk through the essential built-in functions you need to control your data types:
◦ int(): Convert strings containing whole numbers into actual integers so you can perform calculations correctly. We'll also see what happens when you try to convert a non-numeric string, which causes a ValueError.
◦ float(): Convert strings or integers into floating-point numbers to work with decimals.
◦ str(): Convert numbers back into strings, which is necessary to avoid a TypeError when you want to combine them with text for display messages.
• How to Check Data Types: Use the type() function to inspect a variable and see what data type it currently holds, a key skill for debugging.
• Practical Code Examples: Follow along with clear examples that demonstrate the wrong way (leading to errors) and the right way to handle numeric inputs and outputs.

notes and article: https://medium.com/@tharannumcode/5-surpri...
https://docs.google.com/document/d/1fr5aft...