Shell Programming and Scripting

if[$# -eq 4] then
if[$1 -ne 1] then
if[$1 -ne 3] then
echo " number of parameters for the selected update less than or greater from the required number1."
exit
fi
fi
 
 
 
 
elif[$# -eq 2] then
if[$1 -ne 4] then
echo " number of parameters for the selected update less than or greater for the required2 "
exit
fi
elif[$# -eq 6] then
if[$1 -ne 2] then
echo " number of parameters for the selected update less than or greater for the required3 "
exit
fi
else
echo" number of parameters less than or greater than the required4 "
exit
fi

if [ $# -eq 4 ]; then

if [ $# -eq 0 ]; then 
  echo hello
fi

if [ $# -eq 4 ]; then
   if [ $1 -ne 1 -a $1 -ne 3 ]; then
      echo "Number of parameters for the selected update less than or greater from the required number1."
      exit
   fi
fi

if [[ $# == 4 ]]; then
   if [[ $1 != 1 && $1 != 3 ]]; then
      echo "Number of parameters for the selected update less than or greater from the required number1."
      exit
   fi
fi