Test two boolean values with AND operator in Perl

Question

I want to test two boolean values in Perl. In case both are 0 do x, in case not do y. For example: $var1 = 0; false in Perl $var2 = 0; false in Perl

if($var1==0 && var2==0)
{
  x //both are false
}
else
{
 y //both are true
}

Answer 1

if ( $var1 && $var2 ) {
   # Both are true.
}
elsif ( !$var1 && !$var2 ) {
   # Both are false.
}

or

if ( !( $var1 xor $var2 ) ) {
   # Both are true or both are false.
   if ( $var1 ) {
      # Both are true.
   } else {
      # Both are false.
   }
}

or

if ( $var1 ) { 
   if ( $var2 ) {
      # Both are true.
   }
} else {
   if ( !$var2 ) {
      # Both are false.
   }
}