Multiple Conditions

To optimize your code and check for multiple conditions at once, you can use if and.

The if and statement allows up to 8 conditional instructions and executes the code only if all of them return true:

if and
    is_key_pressed 114
    is_key_pressed 115
then
    // This code will execute only if both `F3` and `F4` keys are pressed.
end

Similarly, the if or statement also allows up to 8 conditional instructions but executes the code if any one of them returns true:

if or
    is_key_pressed 114
    is_key_pressed 115
then
    // This code will execute if either `F3` or `F4` key is pressed.
end

Unlike many programming languages, conditions in GTA scripts are not lazy. The game will always evaluate all of them. It may result in a crash if conditions assume the result of the preceding conditions. For example, you can’t check if a character exists and then check its location in the same if statement:

if and
    does_char_exist testChar
    not locate_char_any_means_char_3d testChar plc 100.0 100.0 100.0 false
then
...
end

This will crash the game if the character doesn’t exist because the game will still try to check its location using an invalid handle.

Instead, you should split these checks into separate if statements:

if
    does_char_exist testChar
then
    if
        not locate_char_any_means_char_3d testChar plc 100.0 100.0 100.0 false
    then
        ...
    end
end