Jam Language Features

A simple, expressive language designed for beginner programmers.

Core Features

• Variables: set x = 5
• Print: print "hello"
• Types: numbers, strings, booleans, lists

Control Flow

• if, otherwise (else-if), else
• repeat 5 { ... }

Math & Strings

• add A and B into result, multiply A and B into result
• square of x, sqrt of x
• uppercase "hello", reverse "abc"

Random & Choice

• random between 1 and 10
• choose from "a", "b", "c" into x

Interaction

• say "Hi there" (browser-only)
• ask "What's your name?" (not supported in browser)

Timer

• timer start, timer stop
• wait 5 (skipped in browser)

Functions

• function greet() { ... }
• function anonymous (n) { return n * 2 }
• Use call greet and access return with last_return

Functional Utils

• map (n) => n * 2 over [1, 2, 3]

Example

set x = 5
if x > 3 {
  print "Greater"
} else {
  print "Less"
}

function double(n) {
  return n * 2
}

set nums = [1, 2, 3]
set doubled = map (n) => n * 2 over nums
print doubled