79-ip-validation.md

Problem:

Write an algorithm that will identify valid IPv4 addresses in dot-decimal format. IPs should be considered valid if they consist of four octets, with values between 0 and 255, inclusive.

Input to the function is guaranteed to be a single string.

Examples

Valid inputs:

1.2.3.4
123.45.67.89

Invalid inputs:

1.2.3
1.2.3.4.5
123.456.78.90
123.045.067.089

Note that leading zeros (e.g. 01.02.03.04) are considered invalid.

Solution