'echo' is a shell builtin. argv[] length restrictions only apply to exec. it's the same reason the script works, which uses more or less the same technique,

'echo' is a shell builtin. argv[] length restrictions only apply to exec. it's the same reason the script works, which uses more or less the same technique, only in a 'for' loop, which, is also builtin. even if it were an issue.. say on a terminal without working scrollback.. you can just as easily: echo 1* and so forth.