Solaris

#!/bin/tcsh
if ($# < 1) then ----> we control parameters count
   echo paramter broken ---> if parameters less than 1 echo message and quit
   exit
endif
set b = ($*) ---> all parametres ($*) to send an array for process easier all 
( so if write --> # ./myscript host1 host2 ...-->  (" $* = host1 host2 ..." ) )
 
foreach i ( $b ) ----> and for loop \for each parameter process
  echo $i host informations  ---> writing messages related our hosts name
  echo "*******************"
   if ( " `/usr/sbin/ping $i 5 | grep alive`" == "" ) then ---> if ping is `not` successfull in 5 seconds
      echo ping broken ---> writing messages related our hosts
      echo ""
   endif
   if ( "`nslookup $i | grep find`" == "" ) then  ---> if nslookup is successfull
      echo $i host records  ---> writing messages related our hosts
      echo "*************"
      nslookup $i  ---> and nslookup result for (each) host because we are still for - loop
   else ---> if nslookup is `not` successfull
      echo $i host does not match any records ---> writing messages related nslookup failure message
      echo "********************************"
      echo ""
      shift ---> and parameter shift (actually `not neccassary` because we use just b parameter for this to below define `set b = ($*)`
however this means $*="host1 host2" just then $*="host2"
   endif
end