Menu
×
   ❮   
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AWS AI GO KOTLIN SASS VUE GEN AI CYBERSECURITY DATA SCIENCE
     ❯   

Go Output Functions


Go has three functions to output text:

  • Print()
  • Println()
  • Printf()

The Print() Function

The Print() function prints its arguments with their default format.

Example

Print the values of i and j:

package main
import ("fmt")

func main() {
  var i,j string = "Hello","World"

  fmt.Print(i)
  fmt.Print(j)
}

Result:

HelloWorld
Try it Yourself »

Example

If we want to print the arguments in new lines, we need to use \n.

package main
import ("fmt")

func main() {
  var i,j string = "Hello","World"

  fmt.Print(i, "\n")
  fmt.Print(j, "\n")
}

Result:

Hello
World
Try it Yourself »

Tip: \n creates new lines.

Example

It is also possible to only use one Print() for printing multiple variables.

package main
import ("fmt")

func main() {
  var i,j string = "Hello","World"

  fmt.Print(i, "\n",j)
}

Result:

Hello
World
Try it Yourself »

Example

If we want to add a space between string arguments, we need to use " ":

package main
import ("fmt")

func main() {
  var i,j string = "Hello","World"

  fmt.Print(i, " ", j)
}

Result:

Hello World
Try it Yourself »

Example

Print() inserts a space between the arguments if neither are strings:

package main
import ("fmt")

func main() {
  var i,j = 10,20

  fmt.Print(i,j)
}

Result:

10 20
Try it Yourself »


The Println() Function

The Println() function is similar to Print() with the difference that a whitespace is added between the arguments, and a newline is added at the end:

Example

package main
import ("fmt")

func main() {
  var i,j string = "Hello","World"

  fmt.Println(i,j)
}

Result:

Hello World
Try it Yourself »

The Printf() Function

The Printf() function first formats its argument based on the given formatting verb and then prints them.

Here we will use two formatting verbs:

  • %v is used to print the value of the arguments
  • %T is used to print the type of the arguments

Example

package main
import ("fmt")

func main() {
  var i string = "Hello"
  var j int = 15

  fmt.Printf("i has value: %v and type: %T\n", i, i)
  fmt.Printf("j has value: %v and type: %T", j, j)
}

Result:

i has value: Hello and type: string
j has value: 15 and type: int
Try it Yourself »

Tip: Look at all the formatting verbs in the Go Formatting Verbs chapter.


W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2023 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.