CoffeeScript - 算术运算符

CoffeeScript 支持以下算术运算符。假设变量A 为10，变量B 为20，则−

示例

以下示例演示如何在 CoffeeScript 中使用算术运算符。将此代码保存在名为arithmetic_example.coffee的文件中

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

打开命令提示符并编译 .coffee 文件，如下所示。

c:\> coffee -c arithmetic_example.coffee

编译后，它会为您提供以下 JavaScript 代码。

// 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);

现在，再次打开命令提示符并运行 CoffeeScript 文件，如下所示。

c:\> coffee arithmetic_example.coffee

执行后，CoffeeScript 文件会产生以下输出。

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