A judgment statement about JavaScript (2)

The previous article describes some of the conditions of execution, conforming to the code block below the condition, to achieve the response effect of the action

This article will describe the for, for/in, while, Do/while loop statements.

For statement:

 for (i=0,i<car.length,i++) {  document.write (Car[i]+ "</br>")}

The car here is the data type of an array, which iterates through all eligible

For/in statement:

 <style type= "text/javascript"; 
 function   MyFunction () {  X;     var  txt= ""  var  person{fname: "Bill", lname: "Gates", age:56   for  (x  In   person) {txt  =txt+person[x]} 
 document.getElementById ("Demo"). Innerhtml=txt;} 
 </style>  

<p id= "Demo" ></p>
<onclick= "myFunction ()"> click </button> 

While statement:

Loops can execute code all the time, as long as the specified condition is true.

 while (i<5)  {  x=x + "The number is" + i + "<br>";  I+ +;  }

The Do/while loop is a variant of the while loop. The loop executes a block of code once, before checking whether the condition is true, and then repeating the loop if the condition is true. (Execute at least once)

 Do   {  x=x + "The number is" + i + "<br>";  I+ +;  }  while (i<5);

A judgment statement about JavaScript (2)