how many if test-command

I am trying to string together if [[]] statements together with && boolean operator. It works up until the 6th one. I can see the code color changes in my atom application and when I paste it in shell as a function to test it fails.

How many of these can you string together or what is another option if 6 is the limit?

test-case()
{
var=0 
var1=0
var2=0
var3=0
var4=0
var5=0
var6=0
var7=0
var8=0
var9=0


if [[ $var -eq "0" ]] && [[ $var -eq "0"  ]] && [[ $var -eq "0"  ]] && [[     $var -eq "0" ]] && [[ $var -eq "0" ]] && [[ $var -eq "0" ]] && [[ $var -eq "0"     ]] [[ $var -eq "0"  ]] [[]]; then
  echo "0"
else echo "not0"
}

user@host$ paste contents above to test the syntax results in: -bash: syntax error near unexpected token `}'