IPv4 Validation

Create a function that takes a string (IPv4 address in standard dot-decimal format) and returns true if the IP is valid or false if it's not.

Examples

isValidIP("1.2.3.4") ➞ true

isValidIP("1.2.3") ➞ false

isValidIP("1.2.3.4.5") ➞ false

isValidIP("123.45.67.89") ➞ true

isValidIP("123.456.78.90") ➞ false

isValidIP("123.045.067.089") ➞ false

Notes

• IPv6 addresses are not valid.
• Leading zeros are not valid ("123.045.067.089" should return false).
• You can expect a single string for every test case.
• Numbers may only be between 1 and 255.
• The last digit may not be zero, but any other might.