Golang fmt with example

In Golang, fmt is a standard library package that provides formatted I/O functionality. It can be used to print output to the console, format strings, and read input from the console. Here's an example of how to use fmt in Golang:

package main

import "fmt"

func main() {

    // Print to console

    fmt.Println("Hello, world!")

    

    // Format string

    age := 30

    name := "John"

    fmt.Printf("%s is %d years old\n", name, age)

    

    // Read input from console

    var input string

    fmt.Print("Enter a string: ")

    fmt.Scanln(&input)

    fmt.Printf("You entered: %s\n", input)

}

In the above example, we import the fmt package and use the Println function to print "Hello, world!" to the console. We then use the Printf function to format a string with the name and age variables. Finally, we use Scanln to read input from the console and Printf to print the input back to the console.