Is there any difference in %d and %s below. I get the same result: my_name = 'Zed A. Shaw' my_age = 35 # not a lie my_height = 74 # inches print "Let's talk about %s." % my_name print "He's %d inches tall." % my_height print "He's %s inches tall." % my_height Let's talk about Zed A. Shaw. He's 74 inches tall. He's 74 inches tall.