Hello , ran into a problem

"I am using Vi," and
Im mid way down in a BASH
and Im trying to simply

make a statement along the lines of simply
Would you like to check the system ,
Y or N

And run these functions
when the Y or yes is given

cat /etc/passwd | wc -l
who | wc -l
ps -e | wc -l

Sorry for my Newness; brand new to this stuff