#! /bin/sh
#
#  Filename:  vartest
#
#  Programmer:  Br. David Carlson
#
#  Date:  January 22, 1995
#
#  Illustrates use of test -z to see if a string variable is empty.
#
myvar=hello
if test -z "$myvar"
then
   echo empty
else
   echo nonempty
fi

#  Now try again with the empty string:
myvar=
if test -z "$myvar"
then
   echo empty
else
   echo nonempty
fi