#assign a space to a variable
var $space =call chr $val=32 var $input =xyz FOOBAR zyx
var $input =$space$input$space # default rtrim
var $output = call rtrim $val=$input
print default rtrim
print input =|$input|
print output =|$output|
# a space can be added (not at the end) as a part
of a $charlist of 2 or more characters
var $output = call rtrim $val=$input ; $charlist=xy z
print a space in the charlist
print input = |$input|
print output = |$output|
# specify a range of characters with ..
var $input = ABCDEFGHIJKLMABCDEF
var $output = call rtrim $val=$input ; $charlist= A..F
J..M
print trim a range of characters
print input = $input
print output = $output