HackerRank Validating phone numbers Solution In Python

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Problem

Let’s dive into the interesting topic of regular expressions! You are given some input, and you are required to check whether they are valid mobile numbers.

A valid mobile number is a ten digit number starting with a 7, 8 or 9.

Concept

A valid mobile number is a ten digit number starting with a 7, 8 or 9.

Regular expressions are a key concept in any programming language. A quick explanation with Python examples is available here. You could also go through the link below to read more about regular expressions in Python.

https://developers.google.com/edu/python/regular-expressions

Input Format

The first line contains an integer , the number of inputs.
 lines follow, each containing some string.

Constraints

1 ≤ N ≤ 10

2 ≤ len(Number) ≤ 15

Output Format

For every string listed, print “YES” if it is a valid mobile number and “NO” if it is not on separate lines. Do not print the quotes.

Sample Input

295874562811252478965

Sample Output

YESNO

Solution – HackerRank Validating phone numbers In Python

import refor _ in range(int(input())):    pattern = bool(re.match(r"[789]\d{9}$", input()))    if pattern:        print('YES')    else:        print('NO')

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