elapsed_time ()
{
SEC=$1
(( SEC < 60 )) && echo "[Elapsed time: $SEC seconds]\c"

(( SEC >= 60  &&  SEC < 3600 )) && echo "[Elapsed time: $(( SEC / 60 )) \
min $(( SEC % 60 )) sec]\c"

(( SEC > 3600 )) && echo "[Elapsed time: $(( SEC / 3600 )) hr $(( (SEC % 3600) / 60 )) \
min $(( (SEC % 3600) % 60 )) sec]\c"
}

