GO learning - 001 Variable

package main

import "fmt"

/*
	四种变量的声明方式
*/

func main() {
	//方法一：声明一个变量
	var a int
	fmt.Println("a = ", a)
	fmt.Printf("type of a = %T\n", a)

	//方法二：声明一个变量，初始化一个值
	var b int = 100
	fmt.Println("b = ", b)
	fmt.Printf("type of b = %T\n", b)

	//方法三：初始化的时候，省去数据类型，通过值自动匹配类型
	var c = 100
	fmt.Println("c = ", c)
	fmt.Printf("type of c = %T\n", c)

	//方法四:(常用的方法)省去var关键字，直接自动匹配
	e := 100
	fmt.Println("e =", e)
	fmt.Printf("type of e = %T\n", e)

	f, g := 2, 3
	fmt.Println("f = ", f, " g = ", g)
}

a =  0
type of a = int
b =  100
type of b = int
c =  100
type of c = int
e = 100
type of e = int
f =  2  g =  3