1*13de33a5SJulio Merino 2*13de33a5SJulio Merinoset -- 1 2 3 4 5 6 7 8 9 10 11 12 13 3*13de33a5SJulio Merino[ "${#+hi}" = hi ] || echo '${#+hi} wrong' 4*13de33a5SJulio Merino[ "${#-hi}" = 13 ] || echo '${#-hi} wrong' 5