Print info in console or not judged by variable

Shell Programming and Scripting
1

I have a code fragment

#dosomething 
(
#do many things 
) |tee -a zzz.log 
#dosomething

I want a varialbe var

if var =1, print the info in (#do many things ) to console, if var=0, not print the info to console

2

At the top of your script:

[ "$VAR" -eq 0 ] && exec 1> /dev/null