How to check if a string matches a regular expression pattern in Golang?

In Go, you can use the regexp package to check if a string matches a regular expression pattern. Here's an example code snippet:

package main

import (
	"fmt"
	"regexp"
)

func main() {
	// Define the regular expression pattern
	pattern := "[a-zA-Z]+"

	// Compile the regular expression
	regex, err := regexp.Compile(pattern)
	if err != nil {
		fmt.Println("Invalid regular expression pattern")
		return
	}

	// Input string to be matched
	input := "Hello"

	// Check if the input string matches the pattern
	if regex.MatchString(input) {
		fmt.Println("Input string matches the pattern")
	} else {
		fmt.Println("Input string does not match the pattern")
	}
}

In this example, the pattern [a-zA-Z]+ matches any sequence of one or more alphabetical characters. Replace the pattern variable with your desired regular expression pattern. The MatchString method of the compiled regular expression object is used to check if the input string matches the pattern.