# show expansion
echo {1..10}
printf '%d\n' {1..10}
./args {1..10}

# show it fail
echo {1..1000000}
echo {1..1000000} > /dev/null
type -a echo
/bin/echo {1..1000000} > /dev/null

# get the limit
getconf ARG_MAX

# show 1 argument fails
echo {1..1000000}
s=$(echo {1..1000000})
/bin/echo "$s"

# explain preferring builtins - loops are ok with this
# bonus: xargs
printf '%d\n' {1..1000000} | xargs /bin/echo
printf '%d\n' {1..1000000} | xargs ./args

# explain xargs and GNU stuff