How I keep run the program

Question

I'm here again.I'm newbie and I have some questions.

I have a code like that,

enter = input("Please type something: ")

if enter == "1":
    print("Hello")

else:
    print("Error")

How I keep run the program after else. So How I do when I type something other than 1, it does say Error and again say Please type something. How how how :=)

I know my English is bad and I ask a lot of questions :(

Stefano Sanfilippo · Answer 1 · 2013-11-03T14:12:36.163

2

You can wrap your code in an infinite loop, so that is iterated indefinitely:

while True:
    enter = input("Please type something: ")
    if enter == "1":
        print("Hello")
    else:
        print("Error")

Terminate your program by hitting CTRL+C on Linux/MacOS or CTRL+Z on Windows. If you want, you can use a word to terminate the program, like this:

while True:
    enter = input("Please type something: ")
    if enter == "1":
        print("Hello")
    elif enter == "quit":
        break
    else:
        print("Error")

Also, if you are using Python 2, then replace input with raw_input, so that what you type is returned verbatim as a string with the trailing new line stripped. See PEP 3111 for more information.

edited Nov 03 '13 at 14:12

answered Nov 03 '13 at 13:55

Stefano Sanfilippo

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Also, he clarified he was using python 2, so input is actually correct. It is new to 33. – Isaiah Taylor Nov 03 '13 at 13:59
@IsaiahTaylor Your comments is misleading, please delete it. – aIKid Nov 03 '13 at 14:02
@IsaiahTaylor, do I have to tell you that in Python you do not declare (you probably meant that, not "define") variables explicitly? Also, since the OP uses Python 2, `raw_input` _is_ correct. – Stefano Sanfilippo Nov 03 '13 at 14:05
@aIKid, I don't see how. – Isaiah Taylor Nov 03 '13 at 14:06
@IsaiahTaylor because they are plain wrong? – Stefano Sanfilippo Nov 03 '13 at 14:07
@StefanoSanfilippo, it says in his tag that he is using 3.x. And sorry, thanks for reminding me about the vat thing, I've been doing Java most recently. – Isaiah Taylor Nov 03 '13 at 14:08
@IsaiahTaylor You can define a variable anywhere. Either in a while loop, for loop, or an if statement. – aIKid Nov 03 '13 at 14:08
@StefanoSanfilippo Ah, he's actually right. In the tags, it's Python 3.x – aIKid Nov 03 '13 at 14:09
@aIKid Actually the question is tagged both Python and Python3... Anyway I added the explanation for both and a link to the "`raw_input` to `input`" PEP. – Stefano Sanfilippo Nov 03 '13 at 14:13

score 0 · Answer 2 · answered Nov 03 '13 at 13:57

0

Stick it in a loop.

enter="0"
while True:
    enter = input("Please type something.")

    if enter == "1":
        print("hello")
    else:
        print("error")

This will keep running until you close the program.

answered Nov 03 '13 at 13:57

Isaiah Taylor

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The first assignment is not necessary. – Stefano Sanfilippo Nov 03 '13 at 13:59
You cannot create var in loop. – Isaiah Taylor Nov 03 '13 at 14:00
Thanks a lot.You saved my life too :=) But Stefano is telling the truth so that worked well – Emek Kırarslan Nov 03 '13 at 14:00

How I keep run the program

2 Answers2