Go 赋值运算符

下表列出了Go语言支持的所有赋值运算符 –

运算符	描述	示例
`=`	简单赋值运算符，将右侧操作数的值赋给左侧操作数	`C = A + B` 将 A + B 的值赋给 C
`+=`	加且赋值运算符，将右侧操作数与左侧操作数相加，并将结果赋给左侧操作数	`C += A` 等同于 C = C + A
`-=`	减且赋值运算符，将右侧操作数从左侧操作数中减，将结果赋给左侧操作数	`C -= A` 等同于 C = C – A
`*=`	乘且赋值运算符，将右侧操作数与左侧操作数相乘，并将结果赋给左侧操作数	`C = A` 等同于 `C = C A`
`/=`	除且赋值运算符，将左侧操作数除以右侧操作数，并将结果赋给左侧操作数	`C /= A` 等同于 `C = C / A`
`%=`	取模且赋值运算符，取两个操作数的模，并将结果赋给左侧操作数	`C %= A` 等同于 `C = C % A`
`<<=`	左移且赋值运算符	`C <<= 2` 等同于 `C = C << 2`
`>>=`	右移且赋值运算符	`C >>= 2` 等同于 `C = C >> 2`
`&=`	位与且赋值运算符	`C &= 2` 等同于 `C = C & 2`
`^=`	位异或且赋值运算符	`C ^= 2` 等同于 `C = C ^ 2`
`\|=`	位或且赋值运算符	`C \|= 2` 等同于 `C = C \| 2`

示例

尝试以下示例来了解Go编程语言中可用的所有赋值运算符。

package main

import "fmt"

func main() {
   var a int = 21
   var c int

   c =  a
   fmt.Printf("Line 1 - =  Operator Example, Value of c = %d\n", c )

   c +=  a
   fmt.Printf("Line 2 - += Operator Example, Value of c = %d\n", c )

   c -=  a
   fmt.Printf("Line 3 - -= Operator Example, Value of c = %d\n", c )

   c *=  a
   fmt.Printf("Line 4 - *= Operator Example, Value of c = %d\n", c )

   c /=  a
   fmt.Printf("Line 5 - /= Operator Example, Value of c = %d\n", c )

   c  = 200; 

   c <<=  2
   fmt.Printf("Line 6 - <<= Operator Example, Value of c = %d\n", c )

   c >>=  2
   fmt.Printf("Line 7 - >>= Operator Example, Value of c = %d\n", c )

   c &=  2
   fmt.Printf("Line 8 - &= Operator Example, Value of c = %d\n", c )

   c ^=  2
   fmt.Printf("Line 9 - ^= Operator Example, Value of c = %d\n", c )

   c |=  2
   fmt.Printf("Line 10 - |= Operator Example, Value of c = %d\n", c )
}

当您编译并执行以上程序时，会产生以下结果 –

Line 1 - =  Operator Example, Value of c = 21
Line 2 - += Operator Example, Value of c = 42
Line 3 - -= Operator Example, Value of c = 21
Line 4 - *= Operator Example, Value of c = 441
Line 5 - /= Operator Example, Value of c = 21
Line 6 - <<= Operator Example, Value of c = 800
Line 7 - >>= Operator Example, Value of c = 200
Line 8 - &= Operator Example, Value of c = 0
Line 9 - ^= Operator Example, Value of c = 2
Line 10 - |= Operator Example, Value of c = 2