$else
Inside an $if block: runs the lines below when no condition above was true.
Example
$if[$isNumber[abc]==true]
A number
$else
Not a number
$endif
Not a number
$elseInside an $if block: runs the lines below when no condition above was true.
$if[$isNumber[abc]==true]
A number
$else
Not a number
$endif
Not a number