Go - 賦值運算子
下表列出了 Go 語言支援的所有賦值運算子：
| 運算子 | 描述 | 示例 |
|---|---|---|
| = | 簡單賦值運算子，將右側運算元的值賦給左側運算元 | C = A + B 將 A + B 的值賦給 C |
| += | 加法賦值運算子，它將右側運算元新增到左側運算元，並將結果賦給左側運算元 | C += A 等效於 C = C + A |
| -= | 減法賦值運算子，它從左側運算元中減去右側運算元，並將結果賦給左側運算元 | C -= A 等效於 C = C - A |
| *= | 乘法賦值運算子，它將右側運算元乘以左側運算元，並將結果賦給左側運算元 | C *= A 等效於 C = C * A |
| /= | 除法賦值運算子，它將左側運算元除以右側運算元，並將結果賦給左側運算元 | C /= A 等效於 C = C / A |
| %= | 取模賦值運算子，它使用兩個運算元進行取模運算，並將結果賦給左側運算元 | C %= A 等效於 C = C % A |
| <<= | 左移賦值運算子 | C <<= 2 等效於 C = C << 2 |
| >>= | 右移賦值運算子 | C >>= 2 等效於 C = C >> 2 |
| &= | 按位與賦值運算子 | C &= 2 等效於 C = C & 2 |
| ^= | 按位異或賦值運算子 | C ^= 2 等效於 C = C ^ 2 |
| |= | 按位或賦值運算子 | C |= 2 等效於 C = C | 2 |
示例
嘗試以下示例以瞭解 Go 程式語言中可用的所有賦值運算子：
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 )
}
編譯並執行上述程式後，將產生以下結果：
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
go_operators.htm
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