Nested Loop Simulator
Nested loops run loops inside other loops. See how the inner loop completes fully for each outer loop iteration. Modify the `print` statement to see different outputs.
`range()` Explorer
The `range()` function generates sequences of numbers, often used in `for` loops. Experiment with different start, stop, and step values.
`enumerate()` Demo
Need both the index and the item while looping? `enumerate()` is your friend! It pairs each item with its index (starting from 0 by default).
Loop Control: `break` & `continue`
You can change a loop's flow using break (exit loop entirely) and continue (skip to next iteration). Observe their effect.
Advanced Loop Challenges
Combine your knowledge! Solve these challenges using nested loops, `range`, `enumerate`, or control flow as needed.
Challenge 1: Simple Grid
Use nested loops with `range` to print a 2x3 grid of coordinates like `(0,0) (0,1) (0,2)` on the first line and `(1,0) (1,1) (1,2)` on the second line. Use `print(f"({row},{col})", end=" ")` inside the inner loop and `print()` after the inner loop.
Challenge 2: Enumerate Evens
Given `items = ["A", "B", "C", "D"]`, use `enumerate` to print only the items at even indices (0, 2, etc.) in the format: `Index 0: A`, `Index 2: C`.
Challenge 3: Find First Multiple
Use `range(1, 11)` (numbers 1 to 10) and `break` to find and print the first number that is divisible by 3. Print only that number (which should be 3).
Advanced Practice Complete!
Fantastic! You've explored more powerful looping techniques. Keep practicing these concepts!
Check the Video Lesson for explanations or return to the Course Menu.