golang 运算符

目录

  • [1. golang 运算符](#1. golang 运算符)
    • [1.1. Types of Operators](#1.1. Types of Operators)
    • [1.2. Bitwise Operators (位运算符)](#1.2. Bitwise Operators (位运算符))
    • [1.3. Logical Operators (逻辑运算符)](#1.3. Logical Operators (逻辑运算符))
    • [1.4. Arithmetic Operators (算术运算符)](#1.4. Arithmetic Operators (算术运算符))
    • [1.5. Assignment Operators (赋值运算符)](#1.5. Assignment Operators (赋值运算符))
    • [1.6. Comparison Operators (比较运算符)](#1.6. Comparison Operators (比较运算符))

1. golang 运算符

1.1. Types of Operators

  1. Bitwise Operators (位运算符)
  2. Logical Operators (逻辑运算符)
  3. Arithmetic Operators (算术运算符)
  4. Assignment Operators (赋值运算符)
  5. Comparison Operators (比较运算符)

1.2. Bitwise Operators (位运算符)

go 复制代码
package main

import "fmt"

func main() {
    x := 3
    y := 5
	z := false
    // 3 -> 011
    // 5 -> 101
    fmt.Println("X AND Y = ", x & y)
    fmt.Println("X OR Y = ", x | y)
    fmt.Println("X EXOR Y = ", x ^ y)
    fmt.Println("X Right Shift 1  = ", x >> 1)
    fmt.Println("X Right Shift 2  = ", x >> 2)
    fmt.Println("Y Left Shift 1 = ", y << 1)
}
sh 复制代码
$ go run bitwise/main.go

X AND Y =  1
X OR Y =  7
X EXOR Y =  6
X Right Shift 1  =  1
X Right Shift 2  =  0
Y Left Shift 1 =  10

很多编程语言使用 ~ 作为一元按位取反(NOT)操作符, Go 重用 ^ XOR 操作符来按位取反:

go 复制代码
// 错误的取反操作
func main() {
    fmt.Println(~2) // bitwise complement operator is ^
}
 
// 正确示例
func main() {
    var d uint8 = 2
    fmt.Printf("%08b\n", d)     // 00000010
    fmt.Printf("%08b\n", ^d)    // 11111101
}

同时 ^ 也是按位异或(XOR)操作符:

go 复制代码
10000010 ^ 00000010 = 10000000

1.3. Logical Operators (逻辑运算符)

go 复制代码
package main

import "fmt"

func main() {
    a := 45
    b := "Something"
    fmt.Println(a > 40 && b == "Something")
    fmt.Println(a < 40 && b == "Something")
    fmt.Println(a < 40 || b == "Something")
    fmt.Println(a < 40 || b != "Something")
    fmt.Println(!(a < 40 || b != "Something"))
}
sh 复制代码
$ go run logical/main.go

true
false
true
false
true

1.4. Arithmetic Operators (算术运算符)

go 复制代码
package main

import "fmt"

func main() {
    a := 30
    b := 50
    fmt.Println("A + B = ", a+b)
    fmt.Println("A - B = ", a-b)
    fmt.Println("A * B = ", a*b)
    fmt.Println("A / B = ", a/b)
    fmt.Println("A % B = ", a%b)
}
sh 复制代码
$ go run arithmetic/main.go
A + B =  80
A - B =  -20
A * B =  1500
A / B =  0
A % B =  30
go 复制代码
package main

import "fmt"

func main() {
    k := 3
    j := 20
    fmt.Println("k = ", k)
    fmt.Println("j = ", j)
    k++
    j--
    fmt.Println("k = ", k)
    fmt.Println("j = ", j)
}
sh 复制代码
$ go run arithmetic/main.go

k =  3
j =  20

k =  4
j =  19

1.5. Assignment Operators (赋值运算符)

go 复制代码
package main

import "fmt"

func main() {
    var a int = 100
    b := 20
    fmt.Println("a = ", a)
    fmt.Println("b = ", b)
    a += 30
    fmt.Println("a = ", a)
    b -= 5
    fmt.Println("b = ", b)
    a *= b
    fmt.Println("a = ", a)
    fmt.Println("b = ", b)
    a /= b
    fmt.Println("a = ", a)
    fmt.Println("b = ", b)
    a %= b
    fmt.Println("a = ", a)
    fmt.Println("b = ", b)
}
sh 复制代码
$ go run assignment/main.go

a =  100
b =  20

a =  130
b =  15

a =  1950
b =  15

a =  130
b =  15

a =  10
b =  15

1.6. Comparison Operators (比较运算符)

go 复制代码
package main

import "fmt"

func main() {
    a := 45
    b := 12
    fmt.Println("Is A equal to B ? ", a == b)
    fmt.Println("Is A not equal to B ? ", a != b)
    fmt.Println("Is A greater than B ? ", a > b)
    fmt.Println("Is A less than B ? ", a < b)
    fmt.Println("Is A greater than or equal to B ? ", a >= b)
    fmt.Println("Is A less than or equal to B ? ", a <= b)
}
sh 复制代码
$ go run comparison/main.go

Is A equal to B ?  false
Is A not equal to B ?  true
Is A greater than B ?  true
Is A less than B ?  false
Is A greater than or equal to B ?  true
Is A less than or equal to B ?  false
相关推荐
何中应几秒前
Oracle数据库安装(Windows)
java·数据库·后端·oracle
bcbnb5 分钟前
iOS 崩溃日志分析工具全指南,多工具协同构建稳定性分析体系
后端
无限进步_5 分钟前
C语言字符串连接实现详解:掌握自定义strcat函数
c语言·开发语言·c++·后端·算法·visual studio
Han.miracle6 分钟前
Java的多线程——多线程(二)
java·开发语言·线程·多线程
舒一笑7 分钟前
PandaCoder 2.4.3 震撼发布!
后端·程序员·intellij idea
阿登林16 分钟前
Unity3D与Three.js构建3D可视化模型技术对比分析
开发语言·javascript·3d
没有bug.的程序员19 分钟前
Spring Boot 整合第三方组件:Redis、MyBatis、Kafka 实战
java·spring boot·redis·后端·spring·bean·mybatis
tonydf28 分钟前
如何正确统计网络用户数量?别再被连接数和独立IP骗了!
后端·网络协议
清空mega34 分钟前
从零开始搭建 flask 博客(1)实验
后端·python·flask
JohnYan39 分钟前
Bun技术评估 - 20 YAML
后端·代码规范·bun