-- card: 108806 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 4507
-- name: 


-- part contents for background part 2
----- text -----
Length

-- part contents for background part 1
----- text -----
the length of <source>
length(<source>) 

The number of characters in the source. 

the length of "hello"
the length of line 4 of field 2
length(line 4 of field 2)

-- part contents for background part 43
----- text -----
337,169