How to read and process a file line by line using bufio.Scanner in Go?

To read and process a file line by line in Go using the bufio.Scanner, you can follow these steps:

Import the required packages:

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

Open the file for reading:

file, err := os.Open("file.txt")
if err != nil {
    panic(err)
}
defer file.Close()

Create a new bufio.Scanner by passing the opened file as input:

scanner := bufio.NewScanner(file)

Iterate over each line in the file using the Scan method of the scanner:

for scanner.Scan() {
    line := scanner.Text()
    // Process the line as needed
    fmt.Println(line)
}

Check for any errors occurred during the scanning process:

if err := scanner.Err(); err != nil {
    panic(err)
}

Here's a complete example:

package main

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

func main() {
    file, err := os.Open("file.txt")
    if err != nil {
        panic(err)
    }
    defer file.Close()

    scanner := bufio.NewScanner(file)
    for scanner.Scan() {
        line := scanner.Text()
        // Process the line as needed
        fmt.Println(line)
    }

    if err := scanner.Err(); err != nil {
        panic(err)
    }
}

Make sure to replace "file.txt" with the actual path of the file you want to read and process line by line.