os.Create() can be used to create an empty file in go. The signature of the function is

func Create(name string) (*File, error) 

Basically this function

• Create a named file with mode 0666
• It truncates the file if it already exits
• In case of path issue, it returns a Path error
• It returns a file descriptor which can be used for both reading and write

Code:

package main

import (
    "log"
    "os"
)

func main() {
    file, err := os.Create("emptyFile.txt")
    if err != nil {
        log.Fatal(err)
    }
    defer file.Close()
}

Output:

Check the contents of the file. It will be empty

The post Create an empty file in Go (Golang) appeared first on Welcome To Golang By Example.

• Create an empty file if the file doesn’t already exist

• If the file already exists then update the modified time of the file.

package main

import (
    "fmt"
    "log"
    "os"
    "time"
)

func main() {
    fileName := "temp.txt"
    _, err := os.Stat(fileName)
    if os.IsNotExist(err) {
        file, err := os.Create("temp.txt")
        if err != nil {
            log.Fatal(err)
        }
        defer file.Close()
    } else {
        currentTime := time.Now().Local()
        err = os.Chtimes(fileName, currentTime, currentTime)
        if err != nil {
            fmt.Println(err)
        }
    }
}

Output:

When running the first time it will create the file. After the first time, it will update the modified time of the file.

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