I need to test for both $var3 and $var4 variables in my IF statement, and am getting an error>

if (!$var3 and !$var4) { Do A}
else
if (!$var4) { Do B}
else
{ Do C }


What is the proper syntax?

Thanks

if (-not $var3 -and -not $var4) { Do A } elseif (-not $var4) { Do B } else { Do C }

Notice there is no space between else and if!!

found my answer: -and

if (!$var3 -and !$var4) { Do A}

Thanks anyway