Loop until a specific user input

Question

I am trying to write a number guessing program as follows   def oracle        n           print  Start number   50      guess   50  Sets 50 as a starting number     n   raw input   n nTrue  False or Correct          while True          if n     True               guess   guess   int guess 5              print             print  What about  guess                  break         elif n     False               guess   guess - int guess 5              print             print  What about  guess                  break         elif n     Correct               print  Success   your number is approximately equal to    guess  oracle     What I am trying to do now is get this sequence of if  elif  else commands to loop until the user enters  Correct   i e  when the number stated by the program is approximately equal to the users number  however if I do not know the users number I cannot think how I could implement and if statement  and my attempts to use  while  also do not work

User · Accepted Answer

As an alternative to  Mark Byers  approach  you can use while True   guess   50       this should be outside the loop  I think while True       infinite loop     n   raw input   n nTrue  False or Correct          if n     Correct           break    stops the loop     elif n     True             etc

User · Answer

Your code won t work because you haven t assigned anything to n before you first use it  Try this   def oracle        n   None     while n     Correct             etc      A more readable approach is to move the test until later and use a break   def oracle        guess   50      while True          print  Current number    0   format guess          n   raw input  lower  higher or stop              if n     stop               break           etc      Also input in Python 2 x reads a line of input and then evaluates it  You want to use raw input   Note  In Python 3 x  raw input has been renamed to input and the old input method no longer exists

[python] Loop until a specific user input

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