What causes an IndentationError in Python within Visual Studio Code?

An IndentationError in Python occurs when the indentation in your code doesn't follow Python's rules. Python uses indentation to define blocks of code (like in loops, functions, and conditional statements). In VS Code, this often happens due to mixing tabs and spaces, inconsistent spacing (e.g., using 2 spaces in one block and 4 in another), or accidentally removing indentation where it's required. VS Code itself doesn't *cause* the error, it *highlights* an error that Python detects.