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Recap - Format Username

Part of the Fundamentals section of Coddy's Lua journey — lesson 49 of 90.

Challenge

Easy

Create a username processing system that standardizes and shortens usernames for display purposes. Declare a variable called rawUsername and assign it the value "GameMaster2024". First, use string.lower() to convert the entire username to lowercase and store the result in a variable called lowercaseUsername. Then, use string.sub() to extract the first 5 characters from the lowercase username and store this shortened version in a variable called displayUsername. Print the final display username.

Try it yourself

-- Declare the rawUsername variable
local rawUsername = "GameMaster2024"

-- TODO: Write your code here
-- Convert to lowercase and store in lowercaseUsername
-- Extract first 5 characters and store in displayUsername

-- Print the final display username
print(displayUsername)

All lessons in Fundamentals

1Introduction

The Language Hello World!Comments

4Operators 2 Relational & Logic

Equality Operators Relational Operators The 'and' Operator The 'or' Operator The 'not' Operator Short-Circuit Evaluation Truthy and Falsy Values Recap - Simple Logic

7Basic Conditional Logic

The if-then Statement The if-then-else Statement The elseif Statement Recap - Treasure Chest

10Tables Part 1: List-Style

What is a Table?Creating a Table Accessing Elements by Index Modifying Elements by Index The Length Operator '#'table.insert()table.remove()Recap - Manage Party Members

13Project: Simple Potion Shop

Project Setup Adding a Potion

Project lesson

Displaying the Inventory

Project lesson

Calculating Total Stock Value

Project lesson

Finding a Specific Potion

Project lesson

Selling a Potion

Project lesson

2Variables and Data Types

What is a Variable?Numbers Strings Booleans The Value 'nil'The type() Function Naming Conventions Recap - Character Profile

5Basic Output

Printing Literals Printing Variables Printing Multiple Values Combining Strings & Variables The tostring() Function Input Cast Recap - Status Report Recap - Till 120

8String Manipulation Basics

string.len()string.upper & string.lower string.sub()string.rep()string.find()Recap - Format Username

11Tables 2: Dictionary-Style

Key-Value Pairs Creating Dictionary-Style Tabl Accessing - Bracket Notation Accessing with Dot Notation Adding and Modifying Pairs Removing Pairs with nil Recap - Item Properties

14Variable Scope

Global Variables Local Variables Why Use Local Variables?Scope and Blocks Recap - Scope Puzzle

3Operators 1 Arithmetic & Conc

Arithmetic Operators Modulo Operator Exponentiation Operator String Concatenation Operator Precedence Recap - Simple Calculations

6Project: Character Stats Disp

Welcome Message Declare Character Stats

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Display Basic Stats

Project lesson

Add a Boolean Flag

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Project lesson

9Functions Basics

Declaring a Function Calling a Function Functions with Parameters Functions with Multiple Params The 'return' Statement Recap - Area Calculator

12Loops Basics

The while Loop The repeat-until Loop The Numeric for Loop for Loop with a Step The 'break' Statement Recap - Countdown

15Final Challenges

Recap - Player Turn Recap - Simple Database Recap - Sum of Even Numbers