is grepper working

package main

import (
    "bufio"
    "fmt"
    "os"
    "regexp"
)

func main() {
    // Get user input for the search pattern
    fmt.Print("Enter the search pattern: ")
    scanner := bufio.NewScanner(os.Stdin)
    scanner.Scan()
    searchPattern := scanner.Text()

    // Open the file for reading
    file, err := os.Open("example.txt")
    if err != nil {
        fmt.Println("Error opening file:", err)
        return
    }
    defer file.Close()

    // Create a regular expression object from the search pattern
    regex, err := regexp.Compile(searchPattern)
    if err != nil {
        fmt.Println("Error compiling regular expression:", err)
        return
    }

    // Scan the file line by line and print matching lines
    scanner = bufio.NewScanner(file)
    for scanner.Scan() {
        line := scanner.Text()
        if regex.MatchString(line) {
            fmt.Println(line)
        }
    }

    // Check for any errors during scanning
    if err := scanner.Err(); err != nil {
        fmt.Println("Error reading file:", err)
    }
}