# Code to test some methods of the the String class.

# Short method of creating a string.
r = "cat"

# Short method of creating a string.
s = "dog"

# Long method of creating a string.
t = String.new("elephant")

# Create an empty string.
u = String.new( )

# Print values of strings.
print "#{r} #{s} #{t} #{u}\n" 

# Test the upcase method (nondestructive).
v = t.upcase
print "#{t} #{v}\n"

# Test the upcase method (destructive).
w = t.upcase!
print "#{t} #{w}\n"

# Test the length method.
print "#{r.length} #{s.length} #{t.length} #{u.length} #{v.length} #{w.length}\n"

# Test the <=> method
print r <=> s, " ", s <=> r, " ", s <=> "dog", "\n"