// ============================================================================
// 002 — Variables and Assignment
// ============================================================================
// Demonstrates let bindings, reassignment, and string interpolation.
//
// Run:   soma run 002_variables.cell run
// Expect:
//   name = Alice
//   age = 30
//   age after birthday = 31
//   greeting = Hello, Alice! You are 31 years old.

cell Variables {

    on run() {
        // "let" creates a new variable binding
        let name = "Alice"
        let age = 30

        // String interpolation uses {variable} inside double-quoted strings
        print("name = {name}")
        print("age = {age}")

        // Variables can be reassigned (no "mut" keyword needed)
        age = age + 1
        print("age after birthday = {age}")

        // You can interpolate multiple variables and field accesses
        let greeting = "Hello, {name}! You are {age} years old."
        print("greeting = {greeting}")

        return greeting
    }
}