Python for Loops & Loop Patterns

Lists become much more useful when Python can process every item for you. This Block introduces the anatomy of a for loop, shows how the loop variable follows each list item, and makes indentation and repetition easy to trace. From there, you will print formatted messages, run small calculations, and combine loops with familiar conditions while keeping the original list unchanged.

What you will learn:

• Read and write a basic for loop over a list
• Understand for, the loop variable, in, the iterable, the colon, and the indented loop body
• Predict which lines run once and which repeat for every item
• Process list items directly with formatted text, calculations, and len()
• Use if, elif, and else to handle items differently
• Fix common mistakes involving indentation, missing colons, quoted variable names, and unnecessary indexing

Leave with a clear loop pattern you can read, trace, and reuse whenever a list needs the same action applied to each item.