Pupli

import "fmt"

func main() {

    var str string
    fmt.Print("Enter a string: ")
    // scans text read from standard input, storing them space-separated
    // for example we can read Mahmood from input, but not Mahmood Ramzani
    fmt.Scanln(&str)
    fmt.Printf("String Value : %v\n",str)

    var str1,str2 string
    fmt.Print("Enter two string: ")
    fmt.Scanln(&str1,&str2)
    fmt.Printf("String Value1 : %v\n",str1)
    fmt.Printf("String Value1 : %v\n",str2)
}

import (
    "bufio"
    "fmt"
    "os"
    "strconv"
    "strings"
)

func main() {

    reader := bufio.NewReader(os.Stdin)
    fmt.Print("Enter text :")
    str, _ := reader.ReadString('\n')
    fmt.Println(str)

    fmt.Print("Enter a number : ")
    str, _ = reader.ReadString('\n')
    // trim space
    trimmedStr := strings.TrimSpace(str)
    // convert string to int
    number, err := strconv.ParseInt(trimmedStr, 10, 32)

    if err != nil {
        fmt.Println(err)
    } else {
        fmt.Println(number)
    }
}

import "fmt"

func main() {

    // using the default formats
    fmt.Println("Hello Mahmood")

    // return values from Println
    n, _ := fmt.Println("Hello Mahmood 2")

    // formats according to a format specifier
    fmt.Printf("Length : %d\n", n)

    isTrue := true
    aNumber := 1400
    name := "Mahmood"

    // The verbs:

    // values in a default format
    fmt.Printf("Boolean : %v\n", isTrue)
    fmt.Printf("Number : %v\n", aNumber)
    fmt.Printf("String : %v\n", name)

    // values with specified format
    fmt.Printf("Boolean : %t\n", isTrue)
    fmt.Printf("Number : %d\n", aNumber)
    fmt.Printf("String : %s\n", name)

    // formats according to a format specifier and returns the resulting string
    myString := fmt.Sprintf("Hello %s", name)
    fmt.Println(myString)
}

References
https://golang.org/pkg/fmt/

package main

import (
    "fmt"
    "time"
)

func main() {

    i := 2
    fmt.Print("Write ", i, " as ")
    switch i {
    case 1:
        fmt.Println("one")
    case 2:
        fmt.Println("two")
    case 3:
        fmt.Println("three")
    }

    switch time.Now().Weekday() {
    case time.Saturday, time.Sunday:
        fmt.Println("It's the weekend")
    default:
        fmt.Println("It's a weekday")
    }

    t := time.Now()
    switch {
    case t.Hour() < 12:
        fmt.Println("It's before noon")
    default:
        fmt.Println("It's after noon")
    }

    whatAmI := func(i interface{}) {
        switch t := i.(type) {
        case bool:
            fmt.Println("I'm a bool")
        case int:
            fmt.Println("I'm an int")
        default:
            fmt.Printf("Don't know type %T\n", t)
        }
    }
    whatAmI(true)
    whatAmI(1)
    whatAmI("hey")
}

References
https://gobyexample.com/switch

package main

import "fmt"

func main() {

    if 7%2 == 0 {
        fmt.Println("7 is even")
    } else {
        fmt.Println("7 is odd")
    }

    if 8%4 == 0 {
        fmt.Println("8 is divisible by 4")
    }

    if num := 9; num < 0 {
        fmt.Println(num, "is negative")
    } else if num < 10 {
        fmt.Println(num, "has 1 digit")
    } else {
        fmt.Println(num, "has multiple digits")
    }
}

References
https://gobyexample.com/if-else

package main

import "fmt"

func main() {

    i := 1
    for i <= 3 {
        fmt.Println(i)
        i = i + 1
    }

    for j := 7; j <= 9; j++ {
        fmt.Println(j)
    }

    for {
        fmt.Println("loop")
        break
    }

    for n := 0; n <= 5; n++ {
        if n%2 == 0 {
            continue
        }
        fmt.Println(n)
    }
}

References
https://gobyexample.com/for

package main

import (
    "fmt"
    "math"
)

const s string = "constant"

func main() {
    fmt.Println(s)

    const n = 500000000

    const d = 3e20 / n
    fmt.Println(d)

    fmt.Println(int64(d))

    fmt.Println(math.Sin(n))
}

References
https://gobyexample.com/constants

package main

import "fmt"

func main() {

    var a = "initial"
    fmt.Println(a)

    var b, c int = 1, 2
    fmt.Println(b, c)

    var d = true
    fmt.Println(d)

    var e int
    fmt.Println(e)

    f := "apple"
    fmt.Println(f)
}

References
https://gobyexample.com/variables