There is a problem in one hidden case , Can you help me ?

Question

#You are given a number input, and need to check if it is a valid phone number.
#A valid phone number has exactly 8 digits and starts with 1, 8 or 9.
#Output "Valid" if the number is valid and "Invalid", if it is not.

#Sample Input
#81239870

#Sample Output
#Valid
#My code
import re

number = input()
pattern1 = r"1|8|9\d{7}"
match1 = re.match(pattern1, number)
if match1:
print ("Valid")
else :
print("Invalid")
>>>>Where is the problem ?

Answer 1

Try r"[1|8|9]\d{7}quot;

Answer 2

re.match is trying to find the regex from the beginning of the string. But doesn't check automatically if the string has any other characters left.
You can insert a dollar sign in the regex to mark the end of string.
r"1|8|9\d{7}quot;

Answer 3

Also, That regex checks number starts with 1 or 8 or 9 followed by 7 digits. So it may have any digits next, not restrict to length 8.
1, 12, 123478978989 are also valid but should be evaluated to invalid.

Answer 4

Yes i did that but nothing changed

Answer 5

I changed this and and added $ but the problem still existing