Reading files

Context

Go provides several ways to read files: os.ReadFile (entire file), bufio (line by line), os.Open + io.ReadAll, etc. Choose based on file size and needs.

Example

Read an entire file and print its content.

Code example

package main

import (
    "fmt"
    "os"
)

func main() {
    data, err := os.ReadFile("example.txt")
    if err != nil {
        fmt.Println("Error:", err)
        return
    }
    fmt.Println(string(data))
}

Output (if example.txt contains “Hello, file!”)

Hello, file!

Useful links

• os.ReadFile
• bufio.Scanner