Display highest thermal zone temperature (°C, Linux)

temperature.sh

#!/bin/bash

max_temperature=0
for d in /sys/class/thermal/thermal_zone* ; do
		temperature=$(cat ${d}/temp)
		if [[ $max_temperature -eq 0 || $temperature -gt $max_temperature ]]; then
			max_temperature="${temperature}";
		fi
done
max_temperature=$(( max_temperature / 1000 ))
echo ${max_temperature}