A simple question on operator

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A simple question on operator

 
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  #1
Dec 27th, 2005
I can do a control loop like this in C++

Python Syntax (Toggle Plain Text) 
  1. int case =0;
  2.  while( case<0 && case>20){}

How am i suppose to implement this in Python? I didn't get any errors if i wrote this, the problem is it doesn't enter the while loop when case<0 and case>5
Python Syntax (Toggle Plain Text) 
  1. while case<0 & case>5:
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Re: A simple question on operator

 
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  #2
Dec 27th, 2005
Hi!

So you want to do something if case is smaller than 0 or greater than 20, right?
Python Syntax (Toggle Plain Text) 
  1. while case<0 or case>20: do something
If case should be between 0 and 20:
Python Syntax (Toggle Plain Text) 
  1. while 0<case<20: do something
Hope this helps.

Regards, mawe
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Re: A simple question on operator

 
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  #3
Dec 27th, 2005
If case <=2 or case >=5, it will enter the while loop. the code below doesn't solve my problem. why can't it enter the while loop when my case match this condition case <=2 or case >=5


Python Syntax (Toggle Plain Text) 
  1. while case<0 or case>20: do something
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Re: A simple question on operator

 
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  #4
Dec 27th, 2005
Something like this works fine:
Python Syntax (Toggle Plain Text) 
  1. try:
  2.     case = int(raw_input("enter a number less then 3 or more than 4: "))
  3. except:
  4.     case = 0
  5. while case <=2 or case >=5:
  6.     # do something to get out of loop
  7.     case += 1
  8.     print case
  9.     if case > 10: break
Notice that case is reserved keyword in C++, also notice that && is and || is or in Python. A simple & is bitwise and in C++ and Python.
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