If Statement

if statements follow C syntax.

if foo(x) {
    print("It's true!");
} else if bar == baz {
    print("It's true again!");
} else if baz.is_foo() {
    print("Yet again true.");
} else if foo(bar - baz) {
    print("True again... this is getting boring.");
} else {
    print("It's finally false!");
}

Braces are mandatory

Unlike C, the condition expression does not need to be enclosed in parentheses (), but all branches of the if statement must be enclosed within braces {}, even when there is only one statement inside the branch.

There is no ambiguity regarding which if clause a branch belongs to.

// Rhai is not C!
if (decision) print(42);
//            ^ syntax error, expecting '{'

If Expression

if statements can also be used as expressions, replacing the ? : conditional operators in other C-like languages.

// The following is equivalent to C: int x = 1 + (decision ? 42 : 123) / 2;
let x = 1 + if decision { 42 } else { 123 } / 2;
x == 22;

let x = if decision { 42 }; // no else branch defaults to '()'
x == ();