I have a bashscript I am working on to help with an installer. why doesn't this work?

    function fn_myFunc(){
            local MYVAR=0
            until ["$MYVAR" -ne 0]; do
                    whiptail --yesno "Yes or No?" --no-button "No" --yes-button "Yes" 10 70
                    echo $MYVAR

This code loops infinitely, even though if Yes is selected, the `echo $MYVAR` prints out 0 and it prints 1 if no is selected.