Language Reference

Pith is designed to be simple and natural to read.

There are no curly braces {} and no semicolons ;. Each line is its own statement, and code blocks simply finish with the word end.

Quick Cheat Sheet

What you want to do	Example	Description
Create a variable	`name = "Alex"`	Stores a value that won’t change
Create a changeable variable	`mut score = 0`	Stores a value you can change later
Print something	`print "Hello!"`	Shows text or numbers in the terminal
If / else decision	`if score > 10 ... end`	Runs code only when something is true
Repeat code	`while score < 10 ... end`	Repeats code in a loop
Break out of a loop	`break`	Stops a loop immediately
Skip to next loop step	`continue`	Jumps to the next turn of the loop
Check two things	`if logged_in and is_admin`	True only if both conditions are true
Check either thing	`if is_weekend or on_vacation`	True if at least one condition is true
Invert a condition	`if not finished`	True if finished is false
Create a function	`fn add(a, b) ... end`	Reusable block of code
Return from function	`return a + b`	Sends a value back to whoever called it

You don’t need semicolons. Just write one command per line:

x = 10
y = 20
print x + y

Use # to write notes in your code that the computer ignores:

# This is a helpful comment
score = 100  # You can also add comments at the end of a line

Text is written inside double quotes:

message = "Hello, World!"

To include special characters:

Variables & Mutability: Storing values with = and changing them with mut.
Types of Data: Working with numbers, text, and true/false values.
Math & Logic: Adding numbers, comparing values, and using and, or, not.
If Statements & Loops: Making decisions with if and repeating code with while.
Functions: Grouping code into reusable actions with fn.
Error Guide: How to read and fix common mistakes.