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 
    
        | 1 | 2 | 3 | 
 
    
        | [+ $a[$row][$col] +] | 
 
    
        | [+ $b[2][$col] +] | 
 
    
        | [+ $a[$row][$col] +] | 
 
[+ $HTML::Embperl::VERSION +]
[+ $tabmode +]
[+ local $tabmode = 1 +]
[- $i = 0 ; while ($i < 10) { $ii[$i] = "ii[$i] = $i" ; $i++ ; } -]