JavaScript

1. <script> </script>

   <script>

   tag is used to embed a JavaScript in a HTML document. 籤用於在HTML文檔中插入一個JavaScript程式
   
   
2. Printing a number 輸出數字
   

   document.write(10)

3. Calculating a number 計算數字
   

   document.write(10*10)

4. Printing a text string 輸出串字
   

   document.write(“10*10”)

5. What is a variable? 甚麼是可變因素？
   A variable is a container for storing data values.
   In other words, it’s a number that changes its value.
   可變因素是一個存儲數值的容器
   也就是說，它是一個可以改變其數值的數字
   
   

   var x=3;
   
   var y=4;
   
   document.write(x*y);