if-statementluabooleannegation

Boolean "not equal to" in Lua (negation of a Boolean conditional)

How do I write an if statement in Lua that negates (inverts/flips) a Boolean variable used as the condition?

For example, in Java, one can write:

boolean a;
a = false;
if (!a) {
    //do something
}

I tried to replicate the above Java code in Lua using the following:

local a
a = false
if (~a) then
    -- do something
end

However, I received an error. How do I write the Lua equivalent of the above Java snippet?

Solution

  • Lua uses mostly keywords. Use not a instead of ~a.