[$ var $a $b $c $d $e $i $j $ii $v $k $fv @a %a @b %h @c @ii %hash $wv $wk @hh @hhh $]
Here it starts with some HTML Text
All values should be undefined:
$a = [+ $a || ''  +] 
$b = [+ $b || ''  +] 
$c = [+ $c || ''  +] 
$d = [+ $d || ''  +] 
$e = [+ $e || ''  +] 
First of all assign a value:
[- $a = '(this is the value in $a)' -] 
Now we have some 'Umlaute':
[- $b = "$a äöü" -]
Now lets look what we are getting from this:
[+ $a +] [+ $b +]
And now a and b together: [+ "$a$b" +]
Here we have some HTML tags within the perl code, Embperl will delete them!
[+ $c = 
 6 + 17  * 3 +]
Embperl will also translate HMTL escapes to the right characters i.e. $a < 6 will get the perl expression $a < 6: 
[- $e = 2 -]
[+ $d = $e < 6 +]
Now they should have a value
$a = [+ $a +] 
$b = [+ $b +] 
$c = [+ $c +] 
$d = [+ $d +] 
$e = [+ $e +] 
[- $a = 1; $b = 0; $c = 5; $d = 'txt' -]
[$if $a$]
    a 
[$ endif$]
[$if $a $]
    a 
[$else$]
    not a
[$ endif $]
[$ if $a$]
    a 
    [$if $b == 0$]
        b is null 
    [$else$]    
        b is not null 
    [$endif$]
[$ else$]
    not a
[$ endif $]
[$ if $a$]
    a 
    [$if $b == 0$]
        b is null 
    [$else$]    
        b is not null 
    [$endif$]
[$ else$]
    not a
    [$if $b == 0$]
        b is null 
    [$else$]    
        b is not null 
    [$endif$]
[$ endif $]
[$ if !$a$]
    not a 
    [$if $b == 0$]
        b is null 
    [$else$]    
        b is not null 
    [$endif$]
[$ else$]
    a
    [$if $b == 0$]
        b is null 
    [$else$]    
        b is not null 
    [$endif$]
[$ endif $]
[- $i = 0 -]
[$ while $i <= $#ffld $]
    [+ $ffld[$i] +] = [+ $fdat{$ffld[$i]} +]
    [- $j = 0 -]
    [$ while $j <= $i $]
        [+ $j++ +] 
    [$ endwhile $]
    
    [- $i++ -]
[$ endwhile $]
 $tabmode = default 
Display an two dimensional array with one, two and three columns !
Please take a look at the source in your browser to see the difference
[-
   undef @a ;
   undef @b ;
   $a[0][0] = 'a1/1' ;
   $a[1][0] = 'a2/1' ;
   $a[1][1] = 'a2/2' ;
   $a[2][0] = 'a3/1' ;
   $a[2][1] = 'a3/2' ;
   $a[2][2] = 'a3/3' ;
   $b[0][0] = 'b1/1' ;
   $b[1][0] = 'b2/1' ;
   $b[1][1] = 'b2/2' ;
   $b[2][0] = 'b3/1' ;
   $b[2][1] = 'b3/2' ;
   $b[2][2] = 'b3/3' ;
   $maxcol=99 ;
-]
   $a[0][[0] = '1/1' ;
   $a[1][[0] = '2/1' ;
   $a[1][[1] = '2/2' ;
   $a[2][[0] = '3/1' ;
   $a[2][[1] = '3/2' ;
   $a[2][[2] = '3/3' ;
$tabmode = default 
[+ $Embperl::VERSION +]
[+ $tabmode || 17 +]
[+ local $tabmode = 1 +]
[- $i = 0 ; while ($i < 10) { $ii[$i] = "ii[$i] = $i" ; $i++ ; } -]
[- $i = 0 -]
[$ while $i <= $#ffld $]
    [+ $ffld[$i] +] = [+ $fdat{$ffld[$i]} +]
    [- $j = 0 -]
    [$ while $j <= $i $]
        [+ $j++ +] 
    [$ endwhile $]
    
    [- $i++ -]
[$ endwhile $]
[- $i = 0 -]
[$ while($i <= 2)$]
    [+ $i++ +]
[$ endwhile $]
[- %h = ('A' => 1, 'B' => 2, 'C' => 3) ; -]
[- @a = ('a', 'b', 'c', 'd') ; -]
[- @hh = map { $_ => $h{$_} } sort keys %h  -]  
[$ while ($v = shift @hh, $k = shift @hh) $]
    [+ "$v = $k" +]
[$ endwhile $]
[- $i = 0 -]
[$ while $i <= $#a $]
    [+ "\@a[$i] = $a[$i]" +]
	[- $i++ -]
[$ endwhile $]
[- $i = 0 -]
[$ do $]
    [+ "\@a[$i] = $a[$i]" +]
	[- $i++ -]
[$ until $i > $#a $]
[$ foreach $v (@a) $]
	[+ $v +] 
[$ endforeach $]
[$ foreach $v (1, 3, 5, 7, 9) $]
	[+ $v +] 
[$ endforeach $]
[$ foreach $v (1..10) $]
	[+ $v +] 
[$ endforeach $]
[$ foreach $v(1..5) $]
	2:[+ $v +] 
[$ endforeach $]
[- %hash = ( a=>1, b=>2, c=>3) -]
[$ foreach $v(sort keys %hash) $]
	3:[+ $v +] 
[$ endforeach $]
[- $i = 0 -]
[$ do $]
    [+ "\@a[$i] = $a[$i]" +]
	[- @hh = map { $_ => $h{$_} } sort keys %h  -]  
	[$ while ($v = shift @hh, $k = shift @hh) $]
		[+ "$v = $k" +]
		[$ foreach $fv (1, 3, 5, 7, 9) $]
			[+ $fv +] 
		[$ endforeach $]
		[$ foreach $fv (()) $]
			[+ $fv +] 
			[- @hh = map { $_ => $h{$_} } sort keys %h  -]  
			[$ while ($wv = shift @hh, $wk = shift @hh) $]
				[+ "$wv = $wk" +]
			[$ endwhile $]
		[$ endforeach $]
	[$ endwhile $]
	[- $i++ -]
[$ until $i > $#a $]
[- undef @a ; undef @b -]
[$ if 1 $]
x
 [$ foreach $a (@a) $]
   [$ foreach $b (@b) $]
   [$ endforeach $]
 [$ endforeach $]
y
[$ endif $]