Go Output
Go has three ways to output text.
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 = "a","b"
fmt.Print(i)
fmt.Print(j)
}
Result:
ab
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 = "a","b"
fmt.Print(i, "\n")
fmt.Print(j, "\n")
}
Result:
a
b
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 = "a","b"
fmt.Print(i, "\n",j)
}
Result:
a
b
Example
Print() inserts a space between the arguments if neither
are strings:
package main
import ("fmt")
func main() {
var i,j = 1,2
fmt.Print(i,j)
}
Result:
1 2
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 = "a","b"
fmt.Print(i, " ", j)
}
Result:
a b
The Println() Function
The Println() function is similar to Print() with the difference that
a space is added between the arguments, and a newline is added at the end:
Example
package main
import ("fmt")
func main() {
var i,j string = "a","b"
fmt.Println(i,j)
}
Result:
a
bThe Printf() Function
The Printf() function first formats its arguments based on the given formatting parameters and then prints them.
Here we use two formatting parameters:
%vis used to print the value of the arguments%Tis used to print the type of the arguments
Example
package main
import ("fmt")
func main() {
var i string = "a"
fmt.Printf("i has value: %v and type: %T", i, i)
}
Result:
i has value: a and type: string
