[root@chenbj test]# pythonPython 2.7.5 (default, Nov  6 2016, 00:28:07) [GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux2Type "help", "copyright", "credits" or "license" for more information.>>> counter=0>>> while counter<10:...     print "Loop number: %s" % counter...     counter += 1... Loop number: 0Loop number: 1Loop number: 2Loop number: 3Loop number: 4Loop number: 5Loop number: 6Loop number: 7Loop number: 8Loop number: 9