2. Language basics

This chapter covers how to write tokens, represent values, bind variables and evaluate expressions.

• Lexical structure: comments, keywords, identifiers and escapes.
• Types and literals: booleans, numbers, strings, null, objects and lists.
• Numbers and precision: bases, numeric widths and rounding.
• Variables and assignment: declarations, rebinding and new data structures.
• Expressions and operators: arithmetic, comparisons, logic, bits and conditions.

var price = 20;
var quantity = 3;
var total = price * quantity;
return {"total": total, "discounted": total >= 50};

The result is {"total":60,"discounted":true}. Variables hold values, expressions calculate values, and objects organize output fields.