Practice>Python>Regex and Parsing>Validating phone numbers

hackerrank.com

Validating phone numbers

Problem Link : https://www.hackerrank.com/challenges/validating-the-phone-number/problem

Difficulty : Easy

 

Tip

• Phone number is started with 7, 8 or 9
• Rest of phone number is consist of 0~9
• its length is 10
• Start with 7, 8 or 9
• [789]{1}
• 9 digiits
• [0123456789]{9}
• should be end as the length is 1
• [789]{1}[0123456789]{9}$

 

Solution

import re N = int(input()) for _ in range(N): s = input() reg = r"[789]{1}[0123456789]{9}$" b = bool(re.match(reg, s)) if b: print('YES') else: print('NO')