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  1. Prepare
  2. Python
  3. Regex and Parsing
  4. Validating phone numbers
  5. Discussions

Validating phone numbers

  • afuzzyduck
     + 0 comments

    here's how to do it without a branch

    import re

if __name__ == '__main__':
    n = int(input())
    phone_number = [input() for i in range(n)]
    
    is_phone_valid = []
    
    valid_prefix = ['7','8','9']
    valid_note = ['NO', 'YES']
    
    for i in phone_number:
        note = i.isdigit() and i[0] in valid_prefix and len(i)==10
        is_phone_valid.append(valid_note[note])
    
    print(*is_phone_valid, sep='\n')

    `