Go语言支持以下赋值运算符：

运算符	描述	示例
=	简单的赋值操作符，分配值从右边的操作数左侧的操作数	C = A + B 将分配A + B的值到C
+=	相加并赋值运算符，它增加了右操作数左操作数和分配结果左操作数	C += A 相当于 C = C + A
-=	减和赋值运算符，它减去右操作数从左侧的操作数和分配结果左操作数	C -= A 相当于 C = C - A
*=	乘法和赋值运算符，它乘以右边的操作数与左操作数和分配结果左操作数	C *= A is equivalent to C = C * A
/=	除法赋值运算符，它把左操作数与右操作数和分配结果左操作数	C /= A 相当于 C = C / A
%=	模量和赋值运算符，它需要使用两个操作数的模量和分配结果左操作数	C %= A 相当于 C = C % A
<<=	左移位并赋值运算符	C <<= 2 相同于 C = C << 2
>>=	向右移位并赋值运算符	C >>= 2 相同于 C = C >> 2
&=	按位与赋值运算符	C &= 2 相同于 C = C & 2
^=	按位异或并赋值运算符	C ^= 2 相同于 C = C ^ 2
|=	按位或并赋值运算符	C |= 2 相同于 C = C | 2

例子

试试下面的例子就明白了所有在Go编程语言可供选择的赋值运算符：

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 )

}

当你编译和执行上面的程序就产生以下结果：

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