Learn Lua in Neovim: Math & String Libraries — floor, random, sub, format & Dice Roller | Episode 23

Lua ships with powerful built-in libraries. In this episode we explore the math library — floor, ceil, abs, max, min, pi, and random — and the string library — sub, find, format, byte, and char. We finish by combining both to build a dice roller function. Every keystroke is shown on screen with 3-second pauses so you can follow along at your own pace. What You'll Learn: - math.floor / math.ceil — rounding down and up - math.abs / math.max / math.min — absolute value and extremes - math.pi — the constant pi, used for circle area - math.randomseed / math.random — generating random numbers - string.sub(s, i, j) — extracting substrings - string.find(s, pattern) — searching within strings - string.format — formatted output like printf - string.byte / string.char — ASCII conversion - Building a dice roller with roll_dice(count, sides) Neovim Commands Used: - Ctrl+d — scroll half a page down - Ctrl+u — scroll half a page up - bbb — move back three words - cw — change word (fix a typo) Timestamps: 0:00 Intro 0:12 Preview 0:44 Open file 1:07 Math Library — floor, ceil, abs, max, min 2:23 Run math basics 3:16 Circle Area with math.pi 4:36 Random Numbers with math.randomseed 5:39 Run pi, area, and random 6:21 String Library — sub and find 7:32 Run string basics 8:17 String Format — %s, %d, %.4f, %x 9:35 Byte and Char — ASCII conversion 10:15 Run format and byte/char 11:08 Dice Roller — roll_dice function 12:47 Run all seven sections 13:50 Review — Ctrl+d / Ctrl+u scrolling 14:00 Recap 14:32 Next: Modules and Require Practice code: https://github.com/GoCelesteAI/learn-lua-in-neovim This is Episode 23 of the Learn Lua in Neovim series. New episodes cover modules, metatables, OOP, and the Neovim Lua API — all coded inside Neovim. Taught by CelesteAI. Like & subscribe for more tutorials! #lua #neovim #programming #tutorial #beginners #learnlua #luaprogramming #neovimtutorial #luamath #luastring #coding