CoffeeScript - 算術運算子

CoffeeScript 支援以下算術運算子。假設變數A 為10，變數B 為20，則−

示例

以下示例演示如何在 CoffeeScript 中使用算術運算子。將此程式碼儲存在名為arithmetic_example.coffee的檔案中

a = 33
b = 10
c = "test"
console.log "The value of a + b = is"
result = a + b
console.log result

result = a - b
console.log "The value of a - b = is "
console.log result

console.log "The value of a / b = is"
result = a / b
console.log result

console.log "The value of a % b = is"
result = a % b
console.log result

console.log "The value of a + b + c = is"
result = a + b + c
console.log result

a = ++a
console.log "The value of ++a = is"
result = ++a
console.log result

b = --b
console.log "The value of --b = is"
result = --b
console.log result

開啟命令提示符並編譯 .coffee 檔案，如下所示。

c:\> coffee -c arithmetic_example.coffee

編譯後，它會為您提供以下 JavaScript 程式碼。

// Generated by CoffeeScript 1.10.0
(function() {
  var a, b, c, result;
  a = 33;
  b = 10;
  c = "test";

  console.log("The value of a + b = is");
  result = a + b;
  console.log(result);

  result = a - b;
  console.log("The value of a - b = is ");
  console.log(result);

  console.log("The value of a / b = is");
  result = a / b;
  console.log(result);

  console.log("The value of a % b = is");
  result = a % b;
  console.log(result);

  console.log("The value of a + b + c = is");
  result = a + b + c;
  console.log(result);

  a = ++a;
  console.log("The value of ++a = is");
  result = ++a;
  console.log(result);

  b = --b;
  console.log("The value of --b = is");
  result = --b;
  console.log(result);

}).call(this);

現在，再次開啟命令提示符並執行 CoffeeScript 檔案，如下所示。

c:\> coffee arithmetic_example.coffee

執行後，CoffeeScript 檔案會產生以下輸出。

The value of a + b = is
43
The value of a - b = is
23
The value of a / b = is
3.3
The value of a % b = is
3
The value of a + b + c = is
43test
The value of ++a = is
35
The value of --b = is
8