elapsed_time ()
{
# This function is intended for Bash shell scripts

SEC=$1

(( SEC < 60 )) && echo -e "[Elasped time: \
$SEC seconds]\c"

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

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