How do you know if a variable contains at least one space?

Question

cmd/bat

The variable contains the name of the folder in which the cmd file is located
Not the path but only the name
But it is not known whether this name contains spaces
How to find out that there are spaces there to wrap in quotes before passing to the parameter?

Answer 1

set varcount=0
for /F "tokens=2" %%a in (%string%) do set /A varcount+=1
if not %varcount%==0 (
set string="%string%"
)