while

while ( expression )
     commands
end

As long as expression is true (evaluates to nonzero), evaluate commands between while and end . break and continue can terminate or continue the loop. See also the Example under shift .

Example

set user = (alice bob carol ted)
while ($argv[1] != $user[1])
   Cycle through each user, checking for a match

   shift user
   If we cycled through with no match...

   if ($#user == 0) then
     echo "$argv[1] is not on the list of users"
     exit 1
   endif
end