Logical Functions

In Chapter III, we learned that conditions are special commands that set a true/false result for the current if statement. What if your own function could do the same? That’s exactly what the logical return type enables.

Functions as Conditions

Declare a function with the logical return type to use it as a condition:

function isPlayerRich(): logical
    int money = store_score {player} 0
    return money > 1000000
end

The return statement takes a condition expression. The result — true or false — is passed back to the caller. Now you can use this function directly in an if statement:

if isPlayerRich()
then
    print_string_now "Living the dream!" 2000
else
    print_string_now "Keep grinding." 2000
end

Returning True or False

Instead of a condition expression, you can return true or false explicitly:

function isValidLevel(level: int): logical
    if or
        level < 0
        level > 6
    then
        return false
    end
    return true
end

This is useful when the logic has multiple branches or when you want the intent to be extra clear.

Combining with Other Conditions

A logical function can be mixed with other conditions in if and or if or, just like any built-in condition:

if and
    isValidLevel(wantedLevel)
    is_player_playing 0
then
    set_max_wanted_level wantedLevel
end