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Go File creation

In Go, we can create File using function Create from os package. We can also write content into file using File.WrtiteString function.

Example of File Creation in Go using Write()

package main

import (
    "fmt"
    "os"
)

func main() {

    f, err := os.Create("data.txt")

    if err != nil {
        fmt.Println(err)
    }

    defer f.Close()

    _, err2 := f.WriteString("old falcon\n")

    if err2 != nil {
        fmt.Println(err2)
    }

    fmt.Println("done")
}


File Creation in Go using WriteAt()


In Go, when creating a file using WriteAt, function will need to take 2 parameters:

  • Bytes from string.
  • Length of Bytes.

package main

import (
    "fmt"
    "os"
)

func main() {

    f, err := os.Create("data.txt")

    if err != nil {
        fmt.Println(err)
    }

    defer f.Close()

    _, err2 := f.WriteString("old falcon\n")

    if err2 != nil {
        fmt.Println(err2)
    }

    fmt.Println("done")
}


File Creation in Go using ioutil.WriteFile()


The outil.WriteFile writes data to the specified file. This is a higher-level convenience function. The opening and closing of the file is handled for us.

package main

import (
    "fmt"
    "io/ioutil"
    "log"
)

func main() {

    val := "old falcon\n"
    data := []byte(val)

    err := ioutil.WriteFile("data.txt", data, 0)

    if err != nil {
        log.Fatal(err)
    }

    fmt.Println("done")
}

Conclusion

In this page (written and validated by ) you learned about Go File creation . What's Next? If you are interested in completing Go tutorial, your next topic will be learning about: Go delete File.



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