The if statement creates the branches and switches of your Xtscript
[...] = optional ... = your value
if ... or ...
...
[else
...]
endif
<!--parser:xtscript-->
# 2 random numbers
var $x = call mt_rand $min=1;$max=100
var $y = call mt_rand $min=1;$max=100

# If ... Or ...
# simulates $x < 50 and $y < 50
if $x > 50 or $y > 50
  print at least one of \$x or \$y is more than 50 <hr />
else
  print Both \$x and \$y are less than 50<hr />
endif

print \$x=$x \$y=$y<br />

<!--/parser:xtscript-->
Show in textarea
Reload
at least one of $x or $y is more than 50
$x=51 $y=28