kjk

// :collection Essential Go
package main

import (
	"fmt"
	"math"
)

// :show start
func sqrt(n float64) (float64, error) {

kjk

// :collection Essential Go
package main

import (
	"fmt"
	"sync"
	"time"
)

// :show start

kjk

// :collection Essential Go
package main

import (
	"fmt"
	"math/rand"
)

// :show start

kjk

// :collection Essential Go
package main

import (
	"fmt"
	"strconv"
)

// :show start
// Stringer is an interface with a single method

kjk

// :collection Essential Go
package main

import "fmt"

// :show start
type Person struct {
	FirstName string
	LastName  string
}

kjk

// :collection Essential Go
package main

import "fmt"

func main() {
	// :show start
	a := [2]int{4, 5} // array of 2 ints

	// access element of array

kjk

// :collection Essential Go
package main

import (
	"bytes"
	"fmt"
	"io"
)

// :show start

kjk

// :collection Essential Go
package main

import (
	"encoding/xml"
	"fmt"
	"log"
)

// :show start

kjk

// :collection Essential Go
package main

import (
	"encoding/xml"
	"fmt"
	"log"
)

// :show start

kjk

// :collection Essential Go
package main

import "fmt"

func main() {
	// :show start
	m := make(map[string]int)

	// set the value