آموزش جاوا اسکریپت javascript قسمت هشتم

 const n = 100;

 x = y + 2;

 var s = "Hello" + " World! "; // a = Hello World!

 var a, x = 5, y = 10;
a = x < y ? x * 3 : x * 5;

 a = (x = 5), x * 10;

 if (شرط) }
 // some code
{ 

 if (شرط) }
 // some code
{
else }
 // some code
{

 if (شرط 1) }
 // some code
{
else if (شرط 2) }
 // some code
{
...
Else}
 // some code
{

 switch (exp) {
 case “value1”:
 // some code 1
 break; 
 …
 case “value”:
 // some code n
 break;
 default:
 // some code
}

 switch (exp){
 case “value1”:
 case “value2”:
 // some code 1
 break; 
 …
 case “value”:
 // some code n
 break;
 default:
 // some code
}

 for (مقدار اولیه اندیس حلقه; شرط حلفه; گام افزایش) {
 … 
}
مثال:
for (var i = 0; i < 5; i++){
…
}

 var l = arr.length;
for (var i = 0; i < l; i++){
…
}

 var obj = { name: “Ali”, family: ”Karimi” };
for (var index in obj){
 alert(index + “: “ + obj[index]); // return “name: Ali” at the first time
}

 var arr = [ “Ali”, ”Karimi”];
for (var index in arr){
 alert(index + “: “ + arr [index]); // return “0: Ali” at the first time
}

 while (شرط){
…
}

 do 
…
} while (شرط);

 loopX:
for(var x = 0; x < 10; x++){
 for (var y = 0; y < 10; y++){
 document.write("(" + x + "," + y +")");
 if (x == 3 && y == 8)
 break loopX;
 }
 document.write("<br>");
}