?????? ??
JavaScript ??
JavaScript? ????? ?????. ?? ??? ??? ??? ?????.
JavaScript ??
JavaScript? ???? ?????.
?????? ??? ????? ?????.
JavaScript Literal
????? ???? ???? 3.14??? ?? ?????.
?? ???? ??, ??? ?? ??? ???(e)? ? ????.
??? ???? ????? ?? ????? ??? ? ????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = 'John Doe';
</script>
</body>
</html>Array ???? ??? ?????:
[40, 100, 1, 5, 25, 10]
Object ) ??? ?? ??:
{firstName:" John", lastName:"Doe", age:50, eyeColor:"blue"}
Function Literal ?? ??:
function myFunction(a , b) { return a * b;}
JavaScript ??
????? ???? ??? ??? ?? ???? ? ?????.
JavaScript? var ???? ???? ??? ???? ??? ???? ??? ?? ?????
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<p id="demo"></p>
<script>
var length;
length = 1;
document.getElementById("demo").innerHTML = length;
</script>
</body>
</html>JavaScript ???
JavaScript? ?? ???? ???? ?? ?????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = (5 + 6) * 10;
</script>
</body>
</html>JavaScript ???? ?? ??? ???? ????.
??, ?? ? ?? ??? ???????????? =????????????????????????????????????????????????????????????????????????=??????????, ?? ? ???? ??? == != <
?? ?????? ?????. x = 5 + 6; y = x * 10;
JavaScript ???var y = x * 10;
JavaScript ???
?? ????? ??? ????? JavaScript? ??????. ?? ??? ? ?? ???? ??? ???.
JavaScript ???? ??, ??(_) ?? ?? ??($)? ???? ???.
?? ??? ??, ??, ?? ?? ?? ??? ? ????(??????? ???? ??? ?? ??? ? ??? ??? ? ?? ??? ??? ? ????). ??? JavaScript?? ?? ??? ??????(????):
abstract else instanceof super
boolean enum int ???break ???? ????? ????
byte ?? let ?
case false ? ???
catch ?? ???? ???
char ??? ??? ??
class float null true
??? ??? ??
?? ?? ?? ??? goto ?? var
?? ??? ?? ???
?? ??? ???? ??
?? ?? ????
????
JavaScript ??
?? JavaScript ?? "??"? ?? ????. ?? ??? // ?? ??? ?????? ?????.
//
JavaScript ??? ??? ???? ????.
JavaScript?? ??, ???, ??, ?? ? ??? ??? ??? ????.
Var Length = 16; // ??? ??? ?? ?????.
var Points = x * 10; // ??? ???? ?? ?? ?????.
var LastName = "Johnson" // String = ["Saab", "Volvo ", "BMW"]; // ?? ???? ?? ?? ??
var person = {firstName:"John", lastName:"Doe"}; // ?? ???? ?? ?? ??
????? ???? ??? ??? ?? ??? ?????. ??? ????? ??? ??? ??? ???? ?? ?? ?????. ??? ??? ???? ??? ?? ?? ???? ????. 16 + "Volvo"16 + "Volvo" ?? ??? ??? ???? ??? ??? ?? ??? ?????? "16Volvo"?????? ? ??? ??? ?? ??? ??? ? ????. ?? ??? ??? ??? ?? ??? ?????. JavaScript ??JavaScript ?? ??? ??? ? ??? ??? ????? ??? ? ????. ?? ?? = ?? ??(?? ??? ??? ??). function myFunction(a, b) {
Return a * b;
JavaScript? ????? ?????.
JavaScript ? ?? ? ???? ?? ?? ?? ??? ????? ????.
??? ??? ????? ?? ???? ?? ???? ?????.
