Lesson 13 of 55
8 mins readWhile Loops (while ... do ... end)
In Plain English
A `while condition do ... end` loop evaluates its condition before executing the loop body and repeats as long as the condition evaluates to true.
Deep Dive: How It Works
Pre-Test Condition: Evaluated before entering the block.
Loop Body: Enclosed between `do` and `end`.
No Increment Operator: Lua has no `++` operator; use `i = i + 1`.
Core Rules to Remember
do ... end Enclosure: Loop blocks start with `do` and terminate with `end`.
i = i + 1: Lua requires explicit assignment `i = i + 1` (no `++`).
Live Interactive Example
Hit Run Code to see it liveCounting with while Loop
Python 3.12
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Output Console
Click "Run Code" to view the rendered output.
How it works: Loop executed 5 times, multiplying n by 2 each iteration.
Your Turn: Micro Challenge
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Micro Exercise
Count Down with while
- Declare `local count = 3`.
- Use `while count > 0 do print("T-" .. count) count = count - 1 end`.
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Sandbox Output
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