How to add pause to a Go program?

When i ever execute a Go Console program it just executes in one second, I've been looking on Google, the Go website and Stackoverflow.

import ( "fmt"
)
func main() { fmt.Println()
}

It closes immediately when i execute it.

EDIT 2 actually i wanted the program to permanently stay paused untill the user presses a button

4 Answers

You can pause the program for an arbitrarily long time by using time.Sleep(). For example:

package main
import ( "fmt" "time" )
func main() { fmt.Println("Hello world!") duration := time.Second time.Sleep(duration)
}

To increase the duration arbitrarily you can do:

duration := time.Duration(10)*time.Second // Pause for 10 seconds

EDIT: Since the OP added additional constraints to the question the answer above no longer fits the bill. You can pause until the Enter key is pressed by creating a new buffer reader which waits to read the newline (\n) character.

package main
import ( "fmt" "bufio" "os" )
func main() { fmt.Println("Hello world!") fmt.Print("Press 'Enter' to continue...") bufio.NewReader(os.Stdin).ReadBytes('\n')
}

package main
import "fmt"
func main() { fmt.Println("Press the Enter Key to terminate the console screen!") fmt.Scanln() // wait for Enter Key
}

The easiest another way with minimal imports use this 2 lines :

var input string
fmt.Scanln(&input)

Adding this line at the end of the program, will pause the screen until user press the Enter Key, for example:

package main
import "fmt"
func main() { fmt.Println("Press the Enter Key to terminate the console screen!") var input string fmt.Scanln(&input)
}

import "fmt"
func main() { fmt.Scanln()
}

I use fmt.Scanln just one line.