Check for a group

Ok, but you asked about single group not groups.
The optimized code:

local objGroup = for o in helpers where ( (o.name == "Group01") and (isGroupHead o) ) collect o
if objGroup.count != 0 then...

ok....Thanks!! :)

Thanks miauu!!! But this is working fine only if there is one group of that name. If there are multiple groups of the same name...it is not working. Instead I have tried this:

objgroup = #()
		for o in helpers do
		(
			if o.name == "Group01" then
			(
				append objgroup o
			)
		)
		
		(
			if objgroup.count != 0 then.....

(	
	groupName = "Group01"
	--	use this
	grp = getNodeByName groupName
	-- or
	-- grp = execute ("$"+groupName)
	if isValidNode grp and isGroupHead grp then
		print "Exst in the scene"
	else
		print "Do not exist in the scene"	
)