How to Fix Python Input Errors: Converting Strings to Int and Float

Published: 05 February 2026
on channel: BYU-Idaho Academics

Stop getting the "TypeError: unsupported operand types" in Python! In this tutorial, you will learn how to properly handle user input and perform mathematical operations by converting data types. We explore the critical differences between strings, integers, and floats, and show you exactly when to use each one.

You will learn how to wrap your input statements with the int() and float() functions, how to debug common errors like the "Invalid literal for int with base 10," and why Python automatically converts your results to a float when mixing numeric types. Whether you are building a simple calculator or counting items in a list, mastering data type conversion is essential for any Python programmer.

0:00 - Introduction to User Input and Math Errors
0:42 - Identifying String vs Integer Types in Debugging
1:18 - Using the int function for Whole Numbers
2:03 - Nesting Input Inside Type Conversions
2:34 - Handling Decimals with the float Function
3:13 - Mixing Integers and Floats in Calculations
3:54 - Choosing Between Int and Float for Your Project

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