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Conditionals

Conditional expressions must evaluate to Bool. Use Bool(x) to typecast, or implement __bool__ on classes.

If / Else​

if !confirmed:
    out = "not yet"
else:
    out = "done"

Else If​

if number > 5000:
    return (out: "large")
else if number >= 2500:
    return (out: "medium")
else:
    return (out: "small")

Ternary Operator​

Single-line conditional assignment:

out = (value if condition else fallback)

Example:

memory status = ("adult" if age >= 18 else "minor")
memory capped = (v if v < 100 else 100)

Switch​

Match against multiple cases with optional default:

switch x * 2:
    case 0:
        s = "zero"
    case 1, 2, 3:
        s = "small"
    case 24:
        s = "twenty-four"
    case x > 10 && x < 20:
        s = "medium range"
    default:
        s = "other"
tip

Cases can be:

  • Literal values: case 0, case "yes"
  • Multiple values: case 1, 2, 3
  • Boolean expressions: case x > 10
  • Class instances (with __eq__): case Person{name: "Alice"}
  • Function calls: case len(s) == 3

Default is optional. If no case matches and no default, nothing happens.

Boolean Evaluation​

Classes can participate in boolean contexts by implementing __bool__:

class Person:
    field name String
    field age U64

    method __bool__() -> (result Bool):
        result = self.age >= 18

endpoint CheckAge(person Person) -> (is_adult Bool):
    is_adult = Bool(person)   // Explicit
    // or
    if person:                // Implicit
        is_adult = true