Anderson Ami wrote:

How I get a substring ?

if 'a' is some string, and you want the first three characters: <!--#var "a[0:3]"--> or <!--#var "a[:3]"--> This is the Python 'slicing operator'. You may want to look up the Python tutorial at www.python.org; the expressions in the 'var' tags are Python expressions (with unfortunately a lot of convoluted stuff due to the _ namespace bits).

How i use a let tag ?

Haven't worked with that one myself yet. :) Regards, and good luck, Martijn