【01安装环境与定义变量】

下载地址

https://studygolang.com/dl
一直下一步就ok(前面不用管gopath那些)

创建自己写代码的文件夹

C:\Program Files\Go\src\shiku.wangfan

先从你好世界开始

package main

import "fmt"

var (
	aa = 3
	ss = "KKK"
	bb = true
)

func variableZeroValue() {
	var a int
	var s string
	fmt.Printf("%d %q\n",a, s)
}

func variableInitalValue() {
	var a, b int = 3, 4
	var s string = "abc"
	fmt.Println(a, b, s)
}

func variableTypeDeduction() {
	var a, b, c, s = 3, 4, true, "def"
	fmt.Println(a, b, c, s)
}

func variableTShorter() {
	a, b, c, s := 3, 4, true, "def"
	b = 5
	fmt.Println(a, b, c, s)
}

func main() {
	fmt.Println("Hello world")
	variableZeroValue()
	variableInitalValue()
	variableTypeDeduction()
	variableTShorter()
	fmt.Println(aa, ss, bb)
}

复数

func euler() {
	c := 3 + 4i
	fmt.Println(cmplx.Abs(c))
	// 结果为：5
}