Programming Forums > Script Programming > Python

Sane · Apr 14th, 2005, 12:24 PM

I've programmed a third of an engine for an RPG but I don't know what while does... :eek:

I see sometimes just

while a:

or

while 1:

I know that adding a condition afterwards loops the indentation lines until that condition becomes untrue. But what if there is no condition like the two I mentioned above?

Moldz · Apr 14th, 2005, 2:04 PM

I am not sure what you are asking here.

(Toggle Plain Text)

while 1:
    print "Stuck in an infinite loop"

The code above is called an infinite loop. The condition will always evaluate to true and the only way to stop the program is kill it (Control-C).

You would usually use it with a break statement. For example:

(Toggle Plain Text)

while 1:
    s = raw_input("Type yes to end: ")
    if s == "yes":
        break
    else
        print "Not ending!"

Sane · Apr 14th, 2005, 2:25 PM

Gah. I'm used to these just being called

"loop:"

Stupid new terms...>_<

Then why have I seen while a? o_O

Well thanks.

Moldz · Apr 14th, 2005, 3:20 PM

Because a is a variable.

(Toggle Plain Text)

a = True
b = 0
while a:
  print b
  b += 1
  if b == 3:
    a = False

Apr 14th, 2005, 12:24 PM	#1
Sane Programming Guru Join Date: Apr 2005 Posts: 1,827 Rep Power: 5	SOLVED: Newbie question. I've programmed a third of an engine for an RPG but I don't know what while does... :eek: I see sometimes just while a: or while 1: I know that adding a condition afterwards loops the indentation lines until that condition becomes untrue. But what if there is no condition like the two I mentioned above? Last edited by Sane; Apr 14th, 2005 at 2:47 PM.

Apr 14th, 2005, 2:04 PM	#2
Moldz Programmer Join Date: Feb 2005 Posts: 54 Rep Power: 4	I am not sure what you are asking here. (Toggle Plain Text) while 1: print "Stuck in an infinite loop" while 1: print "Stuck in an infinite loop" The code above is called an infinite loop. The condition will always evaluate to true and the only way to stop the program is kill it (Control-C). You would usually use it with a break statement. For example: (Toggle Plain Text) while 1: s = raw_input("Type yes to end: ") if s == "yes": break else print "Not ending!" while 1: s = raw_input("Type yes to end: ") if s == "yes": break else print "Not ending!" Last edited by Moldz; Apr 14th, 2005 at 2:14 PM.

Apr 14th, 2005, 3:20 PM	#4
Moldz Programmer Join Date: Feb 2005 Posts: 54 Rep Power: 4	Because a is a variable. (Toggle Plain Text) a = True b = 0 while a: print b b += 1 if b == 3: a = False a = True b = 0 while a: print b b += 1 if b == 3: a = False

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Apr 14th, 2005, 2:25 PM	#3
Sane Programming Guru Join Date: Apr 2005 Posts: 1,827 Rep Power: 5	Gah. I'm used to these just being called "loop:" Stupid new terms...>_< Then why have I seen while a? o_O Well thanks.

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Programming Forums > Script Programming > Python

Newbie question.