Double Check of entered PIN for equality

Question

I need to write a python code which checks for equality for the entered pin second time and then proceeds further. Here is how my code goes:

id1 = int(input("Enter 4-digit account pin: "))
id2 = int(input("Re-Enter 4-digit account pin for confirmation: "))
if id1 == id2:
    id = id1
else:
    id2 = int(input("Incorrect pin.. Please Re-enter: "))

Here after my pin gets verified it needs to get assigned to a variable named id. But the above code works only when I enter the incorrect pin once. If I enter again, the code continues to the next step. I want the code to repeat the equality check until both the entered pins are equal and after confirmed as equal, needed to get assigned to the variable id. Please help.

use while loop, while id1!=id2: id2 = (take input) id = id1 Further downvoting this question. — Rahul, Oct 24 '20 at 04:56
I meant by the if condition, the line which says ```if id1 == id2``` — Mujeebur Rahman, Oct 24 '20 at 04:57

score 2 · Accepted Answer · answered Oct 24 '20 at 04:56

2

Use a while loop:

id1 = int(input("Enter 4-digit account pin: "))
id2 = int(input("Re-Enter 4-digit account pin for confirmation: "))
while id1 != id2:
    id2 = int(input("Incorrect pin.. Please Re-enter: "))
id = id1

This repeatedly asks for PIN confirmation until the two values are equal.

answered Oct 24 '20 at 04:56

EnderShadow8

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6
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What if the mistake was actually on `id1`? You never ask for that input again. – John Gordon Oct 24 '20 at 05:00
It doesn't matter whatever was entered in id1. At the end I need id1 to be equal to id2 – Mujeebur Rahman Oct 24 '20 at 05:04
The OP didn't mention that, so I assumed it would not be a problem. – EnderShadow8 Oct 24 '20 at 05:04

score 1 · Answer 2 · answered Oct 24 '20 at 04:57

1

Wrap the whole thing in a while id1 != id2 loop.

# initialize to different values so the input loop will run at least once
id1 = 1
id2 = 2

# keep asking for both inputs until they are equal
while id1 != id2:
    id1 = int(input(...))
    id2 = int(input(...))

    if id1 != id2:
        print("Incorrect.  Please re-enter")

# loop is done, so id1 is the same as id2
id = id1

answered Oct 24 '20 at 04:57

John Gordon

29,573
7
33
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Also a valid answer, but I think the OP was looking for something more like mine. +1 – EnderShadow8 Oct 24 '20 at 05:06

Double Check of entered PIN for equality

2 Answers2