Operators and expressions

Learning objective

Use Lucia operators to build clear and correct expressions.

Key syntax

let x: int = 5;
x += 2;
let ok: bool = (x > 3) && true;
let level: string = if(x >= 7) ? "high" : "low";
let nick: string = providedName ?? "guest";

Examples

Arithmetic: + - * / %.
Assignment: = += -= *= /= %= ++ --.
Comparison: == != < <= > >=.
Logical: && || ! not.
Conditional: ternary if(cond)? : and null coalescing ??.

Common mistakes

Confusing assignment = with equality ==.
Misusing precedence in combined logical expressions.

Suggested practice

Build a score classifier using arithmetic and ternary expressions.

syntax-control-flow
string-interpolation