How to Match a String Against a Regex in Go

Use regexp.MatchString to check if a string matches a pattern, returning a boolean result.

import "regexp"

matched, err := regexp.MatchString(`^\d{3}-\d{2}-\d{4}$`, "123-45-6789")
if err != nil {
    // handle error
}
// matched is true if the string fits the pattern

Alternatively, compile the pattern once for repeated use with regexp.Compile and call .MatchString on the resulting *regexp.Regexp.

Matching a string against a regex in Go checks if text follows a specific rule, like a phone number format or email address. It acts like a digital bouncer that only admits text matching the dress code. You use this technique whenever you need to validate user input or search for specific patterns in data.