Why cannot jump out the loop?

[Jinming Xu]

Hi Everyone,

I have a very simple python program, which includes a while loop. But to my 
surprise,  it cannot jump out the while loop. Does anyone know why?

Here is the program:
___________________________
#!/usr/bin/env python
import sys
n=sys.argv[1]
i=0
while i<n:
  print "i=",i," n=",n
  i+=1
-----------------------------------------------------

Thanks in advance!

Jinming

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