base_syntax_example.go

package main

import "fmt"

func main(){
    a := 3
    if a == 3 {
        fmt.Println("1. if-else, a == 3")
    } else {
        fmt.Println("1. if-else, a != 3")
    }

    if a == 10 {
        fmt.Println("2. if-else, a == 10")
    } else {
        fmt.Println("2. if-else, a != 3")
    }

    if a == 1 {
        fmt.Println("3. if-else, result = 1")
    } else if a == 2 {
        fmt.Println("3. if-else, result = 2")
    } else if a == 3 {
        fmt.Println("3. if-else, result = 3")
    } else {
        fmt.Println("3. if-else, result = unknown")
    }

    switch {
    case a == 1:
        fmt.Println("4. switch, result = 1")
    case a == 2:
        fmt.Println("4. switch, result = 2")
    case a == 3:
        fmt.Println("4. switch, result = 3")
    default:
        fmt.Println("4. switch, result = unknown")
    }


    count := 0
    for {
        fmt.Println("for-while", count)
        if count == 3{
            break
        }
        count++
    }

    count = 0
    for count < 3 {
        fmt.Println("for-while 2", count)
        count++
    }

    for count=0; count < 3; count++ {
        fmt.Println("for-while 3", count)
    }

    mylist := []int{10, 20, 30}
    for index, value := range mylist{
        fmt.Println("for-range", index, value, mylist[index])
    }
}

user_types.go

package main

import "fmt"

type Account struct {
    first_name string
    age int
}

func main() {
    user := Account{"Ян", 26}
    fmt.Println(user)
}