Why is it better to use a string data type for a phone number?

Phone numbers are better stored as strings rather than numbers for several reasons:

• Ability to store leading zeros. For example, the number +7 012 345-67-89 should keep the zero after the country code.
• Presence of special characters. Numbers may include plus signs (+), parentheses, hyphens, spaces, which are important for formatting and international standards.
• No arithmetic operations. Mathematical calculations are not performed on phone numbers, so a numeric type is unnecessary.
• Different lengths and formats. Phone numbers can vary in length and structure across different countries.

Example in Go:

var phoneNumber string = "+7 (912) 345-67-89"

This approach ensures correct storage and processing of numbers.