Prototype - abs() 方法

此方法返回数字的绝对值。

语法

number.abs();

返回值

返回数字的绝对值。

示例

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         function showResult() {
            alert( "Math.abs(-5) : " + Math.abs(-5) );
            alert( "(-5).abs() : " + (-5).abs() );
            alert( "(5).abs() : " + (5).abs() );
         }
      </script>
   </head>

   <body>
      <p>单击按钮查看结果。</p>
      <br />
      <br />
      <input type = "button" value = "Result" onclick = "showResult();"/>
   </body>
</html>

输出

prototype_number_processing.html