Learn Lua in Neovim: Numbers and Arithmetic — Operators & Receipt Calculator | Episode 3
Put Lua's number type to work! In this episode we cover every arithmetic operator — addition, subtraction, multiplication, division, modulo, exponentiation,
and floor division — then build a mini receipt calculator to tie it all together.
Every keystroke is shown on screen with 3-second pauses so you can follow along at your own pace.
What You'll Learn:
Lua's single number type (no int vs float split)
Arithmetic operators: +, -, *, /, %, ^, //
Floor division (//) vs regular division (/)
Modulo (%) to get remainders
Exponentiation (^) for powers
Building a receipt calculator with real math
Source Code:
https://github.com/GoCelesteAI/learn-...
Timestamps:
0:00 - Introduction
0:12 - What You'll Learn (Preview)
0:44 - Receipt Calculator: Item Prices
1:38 - First Run: Subtotal
2:39 - Tax Rate & Multiplication
3:42 - Full Receipt: Subtotal + Tax + Total
4:15 - Floor Division, Modulo & Exponent
5:19 - Order of Operations
5:52 - Final Run: All Output
5:57 - Recap: Key Takeaways
6:29 - End Screen
Key Takeaways:
1. Lua uses one number type for all math
2. // is floor division, % is remainder
3. ^ raises a number to a power
4. Variables store intermediate calculation results cleanly
5. print() shows computed values without extra code
This is Episode 3 of the Learn Lua in Neovim series. New episodes cover strings, booleans, conditionals, and more — all coded inside Neovim.
Taught by CelesteAI. Like & subscribe for more tutorials!
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Category: Science & Technology