How to fix this Script for the correct output?

I am trying to compare actual values from /etc/sysctl.conf to the recommended values using shell scripting. Both the values are same but instead of if else statement is getting executing.

shmmnireq=4096

shmmni= grep "shmmni" /etc/sysctl.conf | cut -d " " -f3

echo $shmmnireq

echo $shmmni

if [[ $shmmnireq == $shmmni ]];

then

echo "shmmni is configured"

else

echo "shmmni is not configured"

fi

and output is

4096

4096

shmmni is not configured