Hgg

2. Client Side Scripr
VB Script
JAVASCRIPT
Server Side Script
PHP
.net
PYTHON

12. Types of variable
• Var
• Let
• Const

13. Var x=“Hello” // variable name
X=90;//update new value
Document.write(x);

14. Let fname=“sameer”;
Let fname=“rahul”; // not declare again

15. Const s=“hello”;
S=“teena”;//not allow

16. Var x =“Hello World”;--------string
Var x=25;-------number
Var x=true;-------boolean
Var x=[“html”,”css”,”php”];----undefined
Var x={first:”june”,last:”doe”};----Object
Var x= null;-----null
Var x;--------undefined
Document.write(typeof x);

17. Operator Description
+ Addition
- Subtraction
* Multiplication
** Exponentiation
/ Division
% Modulus (‘remainder)
++ Increment
-- Decrement

18. =
+=
-=
*=
/=
%=
**=

19. Var x=90;
Console.log(x+20);
Console.table([1,2,3]);
Console.error(“error”);
Cosole.warn(“warning”);
Console .clear()
Console.time(“test”);
Console.timeEnd(“test”);

20. >
>=
<
<=
== only check content not data type
=== equal value and equal type
!=
!==not equal value or not equal type
Console.log(20>4);

21. If
If –------ else
If ------ else if ------- else

22. &&
||
!

23.  ? :

24.  Swtch(expression)
 {
 Case condition 1 : statement(s)
 Break;
 Case condition 1 : statement(s)
 Break;
 Case condition 1 : statement(s)
 Break;
 Case condition 1 : statement(s)
 Break;
 Default : statement(s)
 }

25. Used to message display
Alert(“Hello Everybody”);
Alert(“Hello Everybody”+”hi”);

26. Confirm(“hello”);
Var a=confirm(“are u happy”);
Alert(a);

27. Take input from user
Prompt(“hello”);

28. Syntax:
• Function functionName()//defining
• {
• }
• functionName();//calling

29. Syntax :
Function sum(parameter1, parameter2)
{
}
Sum(a,b);

30. Function name()
{
Return value;
}
var a=name();

31. Var a=10; // global variable
Function functionName()
{
Var b=25;//local variable
}

32. • Click(onclick)
 Double Click(ondblclick)
 Right Click(oncontextmenu)
 Mouse Hover(onmouseenter)
 Mouse Out(onmouseout)
 Mouse Down(onmousedown)
 Mouse Up(onmouseup)
 Key Press(onkeypress)
 Key Up(onkeyup)
 Load(onload)
 Unload(onunload)
 Resize(onresize)
 Scroll(onscroll)

33. Function Hello()
{
Alert(“Hello”);
}
<button onclick=“hello()”>Click Me<button>

34. While loop
Do/while loop
For loop
For/in loop(objects)
forEach loop(Array)

35. Initialization
While(condition)
{
//statement
Increment/decrement
}

36. Initialization
Do
{
//statement
Increment/decrement
}while(condition);

37. For(initialization;condition;increment/decre
ment)
{
//statement
}

38. The break statement "jumps out" of a loop.
The continue statement "jumps over" one
iteration in the loop.

39. Loop inside loop
For(initia;condtion;incre/decre)
{
For(initia;condition;incre/decre)
{
//statement
}
}

40.  JavaScript label mainly use with break and/or
continue statement.
 JavaScript label is unique name as an
identifier for a statement.
 General Syntax
 label:
 or
 label:
 {
 // Scope of the block
 }

41. <script>
outer:
for(var i = 1; i <= 3; i++){
inner:
for (var j = 0; j <= 5; j++){
if (j == 2){
document.writeln("skipped");
continue inner;
} else if(j == 4){
document.writeln("terminated");
break inner;
}
document.writeln("i : " + i + ", j :" + j);
}
document.writeln();
}
</script>

42. JavaScript array is a collection of values
that are belonging to a same data type.
Notes : JavaScript Array use numeric
indexes where as Object use numeric as
well as string name.

43. my_array = [value1, value2, ..., valueN];
my_array = new Array(value1, value2, ...,
valueN);
my_array = new Array(array_size);

44.  Array Literal Method
• var random_list = [5, 12, 8, 22, 2, 30];
• var domain = [".com", ".net", ".org", ".gov"];
 JavaScript Built-in Array Constructor Method
 var random_list = new Array(5, 12, 8, 22, 2, 30);
 var domain = new Array(".com", ".net", ".org", ".gov");
 JavaScript size of array length
 var domain = new Array(10);
 Or
 var domain = new Array( );
 Find the length of Array Array.length
 domain.length

45. Var a={
 [“Harry”,18,”male,”,”B. Com”],
 [“Sunny”,19,”male,”,”BCA”],
 [“Sarah”,18,”female,”,”B. Com”],
 [“Tom”,17,”male,”,”B. A”]
 };

46.  a[1]=19;

47. delete a[1];

48. Sort() Slice() Find()
Reverse() Splice() findIndex()
Pop() isArray() Includes()
Push() indexOf() Entries()
Shift() lastIndexOf() forEach()
Unshift() Some() toString()
Concat() Every() valueOf()
Join() Filter() Fill()

49. Var a=[1,2,3];
Var a={
Fname:””Ram”;
Lname:”kumar”;
Age:18;
Country:”india”;
};

50. Var a=new Object();
A.fname:”Ram”;
A.lname=“Kumar”;

51. Var student={
{ name:”Ram”,age:15},
{ name:”kavita”,age:17},
{ name:”Rahul”,age:25},
{ name:”Mohan”,age:20},
};

52. Var a=[1,2,3,4,];
[10,20,30,40]
A.map();
A.map(function(){
Statement});

53. Length indexOf() Concat()
toLowerCase() lastIndexOf() Split()
toUpperCase() Replace() Repeat()
Includes() Trim() Slice()
startsWith() charAt() Substr()
endsWith() charCodeAt() Substring()
Search() fromCharCode() toString()
Match() valueOf()

54. Number()
parseInt()
parseFloat()
isFinite()
isInteger()
toFixed(x)
toPrecision(x)

55. Ceil(x) Sqrt(x)
Floor(x) Cbrt(x)
Round(x) Pow(x,y)
Trunc(c) Random()
Max(x,y,z,..n) Abs(x)
Min(x,y,z...n) PI

56. Var now=new Date();

57. toDateString() getMilliseconds()
getDate() setDate()
getFullYear() setFullYear()
getMonth() setHours()
getDay() setMilliseconds()
getHours() setMinutes()
getMinutes() setMonth()
getSeconds() setSeconds()