BASH script beep when tempreture hot - FREEBSD

I have been working on a bash script to beep the the pc is too hot. I have removed the beep to try identifying the problem What i have so far

temp=$(sysctl -n hw.acpi.thermal.tz0.temperature | tr -d 'C')
echo $temp

if ["$temp" -gt "30.1"]
then
   echo "temp hot"
else
   echo "temp ok"
fi

my output is

54.1
temp.sh: line 4: [54.1: command not found
temp ok

removing the if statement just outputs

54.1

so i think its the if statement thats not working