go（一）变量

package main

import (
    "fmt"
)

func main() {

    var a int
    a = 1
    var a1 string
    a1 = "my is a1"
    b := 2
    b1 := "my is b1"

    fmt.Println(a, "^^^^", a1)
    fmt.Println(b, "^^^^", b1)
}

[ `go run  test.go` | done: 208.870174ms ]
    1 ^^^^ my is a1
    2 ^^^^ my is b1

接下来是件很有趣的，有了python的列表的影子，但go语言称之为“字节数组”

package main

import (
    "fmt"
)

func main() {

    a := "my is b"
    b := []byte(a)
    fmt.Println(string(b[0]))

}

[ `go run  test.go` | done: 190.573207ms ]
    m

package main

import (
    "fmt"
)

func main() {

    a := "my is b" +
        " test"

    b := `my
        name 
        is `

    fmt.Println(a)
    fmt.Println(b)

}

[ `go run  test.go` | done: 197.232301ms ]
    my is b test
    my
            name
            is

 

 

var是声明全局变量与赋值的

const 常量的定义，

type 一般类型的声明

 

package main

import (
    "fmt"
)

func main() {
    var (
        name = "wang"
        age  = 12
    )
    fmt.Print("hello", name, "age is:", age)
}

[ `go run hello.go` | done: 201.697722ms ]
    hellowangage is:12

 

 

 

类型lingzhii:

当变量被声明某种类型后的默认值，

通常情况下值类型为0

bool为false

string为空字符串

package main

import (
    "fmt"
)

func main() {
    var a int
    var b string
    var c bool
    fmt.Println(a)
    fmt.Println(b)
    fmt.Println(c)
}

[ `go run test1.go` | done: 215.061592ms ]
    0
    
    false