else

Introduces the branch of an if that runs when its condition is false (or its pattern does not match).

else is followed by a block or by another if, which forms an else if chain.

fn describe(int n) -> string {
    if n % 2 == 0 {
        return "even";
    } else {
        return "odd";
    }
}

See also#

• fn: Declares a function, a method, or (written in an expression) an anonymous function.
• let: Declares a mutable local variable.
• const: Declares a binding that cannot be reassigned: a local, a module constant, or a class field that is set only by new.
• static: Declares a module-level or class-level slot shared by the whole program, or a method without self.
• readonly: A read-only view of a value: nothing reachable through it can be changed.
• if: Runs a block when a bool condition is true.
• while: Repeats a block while a bool condition is true.
• for: Iterates over the values of an array, Vec, range, coroutine or any IntoIterator.