Go Output Functions #

Go provides three primary functions to output text to the console:

1. Print()
2. Println()
3. Printf()

✅ The Print() Function #

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

Example 1: Print two string variables #

package main

import "fmt"

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

    fmt.Print(i)
    fmt.Print(j)
}

Result:

HelloWorld

Example 2: Print arguments in new lines using \n #

package main

import "fmt"

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

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

Result:

Hello
World

Example 3: Print multiple variables in one Print() call #

package main

import "fmt"

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

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

Result:

Hello
World

Example 4: Add a space between string arguments #

package main

import "fmt"

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

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

Result:

Hello World

Example 5: Space automatically added between non-string arguments #

package main

import "fmt"

func main() {
    var i, j = 10, 20

    fmt.Print(i, j)
}

Result:

10 20

✅ The Println() Function #

The fmt.Println() function is similar to Print() but adds a space between arguments and a newline at the end.

Example: #

package main

import "fmt"

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

    fmt.Println(i, j)
}

Result:

Hello World

✅ The Printf() Function #

The fmt.Printf() function formats its arguments based on formatting verbs and prints them.

Formatting Verbs 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

👉 Tip: Refer to the Formatting Verbs chapter for a complete list of verbs.

🚀 With these functions, you can effectively print output to debug, log, or display results in your Go programs.