Need to display a message after who command 1

[maxcrook]

I need to run the who command in a script that will then display a message stating that there are more than 1 users on the system should the results of the who command return more than 1 users logged on.

I know the following does not work but am i on the right lines ? Anyone already run a similar script ?
num=`who`
if [ "$num" -gt "1" ]
then
print "MORE THAN ONE USER ON SYSTEM"
fi

 

[gileb]

if [[ $(who |wc -l) -gt 1 ]]
then
echo more than 2
fi