when i use if its says that it needs a Expected conditional expression after "if".

and I dont know what to put in there

    If you have never programmed before I recommend reading through a Godot or Python introduction. This is not something you can guess your way through, and tutorials in my opinion will leave gaps. Better to take an intro class.

    maty64 the "if" needs to make something happen. So you're likely missing a line of code somewhere. If you don't, your program doesn't know what to do after that condition (IF) occurs. Basically:

    if _myVariable == 0:
        ### this is where what needs to happen happens
    7 months later

    This; "Expected conditional expression after "if"." keeps appearing

      G_Godot147741 you need something after the if. A comment isn't enough. If you don't want to do anything, put "pass".

      Like this:

      if _myVariable==0: pass

      You can learn more about "if" there: https://docs.godotengine.org/en/stable/tutorials/scripting/gdscript/gdscript_basics.html#if-else-elif

      This behavior (needing something to do, a comment not being enough) is a design shared by Python. You can find a good discussion there:
      https://stackoverflow.com/questions/51913755/when-is-pass-necessary-in-a-python-if-statement