Tutorial

Browser runtime: loading…

Start with the core syntax: print output, define methods, instantiate a class, and assign values. Each runnable snippet uses the same WASM engine as the playground.

Hello, Sapphire

print writes a line. Double-quoted strings can interpolate with #{} — same idea as Ruby.

hello.spr

print "Hello from Sapphire!"
who = "world"
print "Hello, #{who}!"

Press Run to execute this snippet. ⌘↵ runs from the editor.

A greet method

Next, wrap the greeting in a def. The last expression in the body is the return value.

greet.spr

def greet(who) {
  "Hello, #{who}!"
}

print greet("world")

Press Run to execute this snippet. ⌘↵ runs from the editor.

A Greeter class

class introduces a type. attr holds state; .new builds an instance, and self is the receiver inside methods.

greeter.spr

class Greeter {
  attr who

  def greet {
    print "Hello, #{self.who}!"
  }
}

g = Greeter.new(who: "world")
g.greet

Press Run to execute this snippet. ⌘↵ runs from the editor.

Values and variables

Assign with =. Types are often inferred; values are objects, so numbers, strings, booleans, lists, and maps all have methods.

values.spr

n = 7
pi = 3
label = "answer"
print "#{label}: #{n + pi}"

Press Run to execute this snippet. ⌘↵ runs from the editor.