go语言基础之变量和常量

1、多个变量

示例1:

package main

import "fmt"

func main() {
	//不同类型变量的声明(定义)
	var a int
	var b float64

	a, b = 10, 3.14
	fmt.Println("a = ", a)
	fmt.Println("b = ", b)

}

#执行结果

a =  10
b =  3.14 

 

示例2:

package main

import "fmt"

func main() {
	//不同类型变量的声明(定义)
	var (
		a int
		b float64
	)

	a, b = 10, 3.14
	fmt.Println("a = ", a)
	fmt.Println("b = ", b)
}

#执行结果

a =  10
b =  3.14

 

示例3:

package main

import "fmt"

func main() {
	//可以自动推导类型
	var (
		a = 1
		b = 2.0
	)

	a, b = 10, 3.14
	fmt.Println("a = ", a)
	fmt.Println("b = ", b)
}

#执行结果

a =  10
b =  3.14

 

 

 

 

 

2、常量

示例1:

package main

import "fmt"

func main() {
	const i int = 10
	const j float64 = 3.14

	fmt.Println("i = ", i)
	fmt.Println("j = ", j)
}

#执行结果

i =  10
j =  3.14

 示例2

package main

import "fmt"

func main() {
	const (
		i int     = 10
		j float64 = 3.14
	)

	fmt.Println("i = ", i)
	fmt.Println("j = ", j)
}

#执行结果

i =  10
j =  3.14

示例3

package main

import "fmt"

func main() {
//自动推导类型 const ( i = 10 j = 3.14 ) fmt.Println("i = ", i) fmt.Println("j = ", j) }

 #执行结果

i =  10
j =  3.14

 

 

 

 

 

 

 

 

 

posted @ 2018-12-30 15:43  努力哥  阅读(270)  评论(0编辑  收藏  举报