Clearing terminal screen in Go - Today I Learned

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Clearing terminal screen in Go

There are two ways I like (without any external dependency)
Using os/exec package
I have added some boilerplate code to make sure you see whats happening. I think this is probably the best way to do this.
package main
 
import (
    "os"
    "fmt"
    "os/exec"
    "time"
)
 
func main() {
	fmt.Println("this is a line")
	fmt.Println("this is a line")
	fmt.Println("this is a line")
	fmt.Println("this is a line")
	fmt.Println("this is a line")
​
	fmt.Println("Clearing Screen in 2s...")
​
	// sleep for 2 seconds
	duration, _ := time.ParseDuration("2s")
	time.Sleep(duration)
    
    c := exec.Command("clear")
    c.Stdout = os.Stdout
    c.Run()
}
Using ANSI Escape Sequences
Not a good way but may come in handy for some situations.
package main
 
import (
    "fmt"
    "time"
)
 
func main() {
	fmt.Println("this is a line")
	fmt.Println("this is a line")
	fmt.Println("this is a line")
	fmt.Println("this is a line")
	fmt.Println("this is a line")
​
	fmt.Println("Clearing Screen in 1s...")
	dur, _ := time.ParseDuration("1s")
	time.Sleep(dur)
​
    fmt.Print("\033[2J")
}
The sequence \033[2J is read as Esc[2J where "2j" clears the screen and moves the cursor to the home position (line 0, column 0).

Anatomy of `go.mod` file

Convert `string` to `int` and vice-versa in Go

Last modified 7mo ago

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Outline

Using os/exec package

Using ANSI Escape Sequences