#!/usr/bin/csh
####################################
# File: if.csh
# Name: Jen Chen
# Updated on: 08/12/04
####################################
#Set the warning message if the user does not enter sufficient arguments on the
#command line.
set USAGE="if.csh argv[1] argv[2] ...; where argv[1], argv[2], ... are command line arguments."

#Initialize the variable count to be 1.
set count = 1

if($#argv < 1) then #DO NOT forget the "then" keyword on this line.
  echo "$USAGE"
else
   while($count <= $#argv)  #Note that $#argv means the total number of
     echo $argv[$count]     #arguments passed from the command line.
     @ count = $count + 1   #All computation has to start with the @ sign
  end                       #in C-shell.
endif #Remember to end your IF-statement with "endif".

##################################
echo "Using if-then-else if-else-endif"

   set num = $argv[1]
   set num2 = $argv[2]
   
   if($num2 < $num) then
      echo "$num2"
      @ num2 = $num2 + 1  #Increment num2 by 1.
   else if($num2 > $num) then
      echo "$num2 is greater than $num"
   else
      echo "$num2 equals to $num"
   endif