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Decisions and Loops
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← Python Basics
○Welcome to Python○Demo: Print a Message○Exercise: Print an Announcement○Demo: Names and Values○Exercise: Label a Station○Demo: Inspect Data Types○Exercise: Record Supplies✦Module Quiz
○Demo: Calculate with Numbers○Exercise: Calculate a Bus Cost○Demo: Format a Message○Exercise: Format an Invoice○Demo: Convert Text to Numbers○Exercise: Convert Measurements○Demo: A Prefilled User Response○Exercise: Build a Workshop Ticket✦Module Quiz
○Compare and branch○Exercise: Choose a shelf sign●Repeat with while○Exercise: Charge a device○Count with for and range○Exercise: Mark bus stops○Skip with continue, stop with break○Exercise: Admit visitors○Project: Workshop sign-in✦Module Quiz
○Define and Call: Demo○Exercise: Define and Call○Parameters and Return: Demo○Exercise: Parameters and Return○Defaults and Keywords: Demo○Exercise: Defaults and Keywords○Local Scope: Demo○Exercise: Local Scope○Project: Workshop Receipts✦Module Quiz
○Index a Text Code○Exercise: Read Badge Edges○Slice a Route Label○Exercise: Slice Ticket Fields○Clean a Message with Methods○Exercise: Standardize a Notice○Format a Card with an f-String○Exercise: Make a Market Sign✦Module Quiz
○Create and Index a Supply List○Exercise: Build a Queue○Change a Playlist○Exercise: Update Orders○Loop and Slice a Route○Exercise: Pack Deliveries○Read a Fixed Tuple Record○Exercise: Read a Session Record✦Module Quiz
○Look Up and Update a Dictionary○Exercise: Update a Contact○Loop Through Dictionary Entries○Exercise: Write a Receipt○Keep Unique Visitors in a Set○Exercise: Compare Club Groups○Demo: Summarize Library Visits○Exercise: Build a Market Roster✦Module Quiz
○Tracebacks and a Safe Count Demo○Exercise: Recover Ticket Counts○Write and Read a Browser File Demo○Exercise: Save and Read a Message○Mini Project: Attendance Log✦Module Quiz
○Import Math: Demo○Exercise: Import Math○Local Module: Demo○Exercise: Local Module○Packages and Dotted Imports✦Module Quiz
○Recursion and a Base Case Demo○Exercise: Recursive Ticket Sum○Lambda, Map, and Filter Demo○Exercise: Clean Badge Names✦Module Quiz
○Classes, Objects, and Enums to Recognize○Final Project: Workshop Board✦Module Quiz

Repeat with while

A greenhouse misting timer ticks while its countdown stays positive. while tests its condition before each turn. Inside the indented loop, reduce seconds so the condition eventually becomes false. The starter prints Mist 3, Mist 2, Mist 1, then Done.

Change the starting seconds from 3 to 4. Press Run to see one extra Mist 4 line before the original three and Done; press Submit to check your edit. Never remove the decrement: a loop that never changes its condition can run forever.

Your Task

  1. Set the starting seconds to 4 so the countdown includes Mist 4.
Loading editor…
Press Run to execute your code.