TypeScript - 算術運算子示例

假設變數 a 和 b 的值分別為 10 和 5。

運算子	描述	示例
+ (加法)	返回運算元的和	a + b 等於 15
- (減法)	返回值的差	a - b 等於 5
* (乘法)	返回值的積	a * b 等於 50
/ (除法)	執行除法運算並返回商	a / b 等於 2
% (模)	執行除法並返回餘數	a % b 等於 0
++ (自增)	將變數的值增加 1	a++ 等於 11
-- (自減)	將變數的值減少 1	a-- 等於 9

示例

var num1:number = 10 
var num2:number = 2
var res:number = 0
 
res = num1 + num2 
console.log("Sum:        "+res); 

res = num1 - num2; 
console.log("Difference: "+res) 

res = num1*num2 
console.log("Product:    "+res) 

res = num1/num2 
console.log("Quotient:   "+res)
 
res = num1%num2 
console.log("Remainder:   "+res) 

num1++ 
console.log("Value of num1 after increment "+num1) 

num2-- 
console.log("Value of num2 after decrement "+num2)

編譯後，將生成以下 JavaScript 程式碼。

//Generated by typescript 1.8.10
var num1 = 10;
var num2 = 2;
var res = 0;

res = num1 + num2;
console.log("Sum:        " + res);

res = num1 - num2;
console.log("Difference: " + res);

res = num1 * num2;
console.log("Product:    " + res);

res = num1 / num2;
console.log("Quotient:   " + res);

res = num1 % num2;
console.log("Remainder:   " + res);

num1++;
console.log("Value of num1 after increment " + num1);

num2--;
console.log("Value of num2 after decrement " + num2);

以上程式的輸出如下所示：

Sum: 12 
Difference: 8 
Product: 20 
Quotient : 5 
Remainder: 0 
Value of num1 after increment: 11 
Value of num2 after decrement: 1

typescript_operators.htm

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