1. Getting Started

Installing STencil

Pick one: - pip: pip install stencil-lang - Windows installer: run STencil-Setup.exe (adds stencil to PATH, associates .st files) - After either, a new terminal has the stencil command.

Running code

stencil program.st          # run a file
stencil                     # start the REPL (interactive shell; type exit to quit)
stencil -c "print(1 + 2)"   # run a one-liner

Hello, world

Create hello.st:

print("Hello, STencil!");

Run it:

stencil hello.st

Output:

Hello, STencil!

print

print takes any number of values, separated by commas, and writes them with spaces between, then a newline:

print("Sum:", 2 + 3, "and done");   // Sum: 5 and done

Comments

// single-line comment
/* multi-line
   comment */
print("comments are ignored");

Semicolons

Semicolons are optional but recommended for clarity:

let a = 1
let b = 2;
print(a + b)   // 3

Next: Variables & Types