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
llz_1123 分钟前
第五周作业(JavaScript)
开发语言·前端·javascript
W.Y.B.G18 分钟前
JavaScript 计算闰年方法
开发语言·前端·javascript
liu****21 分钟前
笔试强训(二)
开发语言·数据结构·c++·算法·哈希算法
马尚道24 分钟前
【完整版10章】Dubbo 3 深度剖析 - 透过源码认识你
后端
渣哥26 分钟前
你以为只是名字不同?Spring 三大注解的真正差别曝光
javascript·后端·面试
Java水解44 分钟前
微服务项目->在线oj系统(Java-Spring)----6.0
后端·微服务
艾菜籽1 小时前
Spring Web MVC入门补充1
java·后端·spring·mvc
用户3421674905521 小时前
SVN高级视频教程
后端
洛卡卡了1 小时前
从被动救火到主动预警,接入 Prometheus + Grafana 全流程
后端·面试·架构
无限进步_1 小时前
扫雷游戏的设计与实现:扫雷游戏3.0
c语言·开发语言·c++·后端·算法·游戏·游戏程序