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