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One
stop solution for VB6, VB.Net, C#, ASP.Net, Crystal Report, Oracle,
SQL Server, MySql, PHP, XML, AJAX .... |
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Java Script
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Java Script Syntax and Features
1. There is no need to declare variable, however you
can
define variable with var keyword.
2. Curl braces ({}) are separated two code blocks.
3. White space and carriage return are not count in
code statement.
4. Semicolon (;) terminate a statement.
5. For single line comment use double slash (//).
6. For multi line comment use /* and */ sign.
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1. What is Java Script
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2. Java Script Syntax
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3. Java Script Objects
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4. Java Script Sample Code
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5. Java Script FAQ
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Variable name rules
Variable are place holder of value used in run time by
the program, every variable has an unique name within the
scope of execution, while declaring the variable always keep
un mind.
1. Must start with number and underscore (_)
2. Use any alphanumeric character.
3. Do not use any special character and white space.
4. Variable name are case sensitive.
5. Do not use keyword as variable name.
Operator and order of precedence
| 1 |
. |
[] |
() |
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| 2 |
++ |
-- |
!~ |
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| 3 |
* |
/ |
% |
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| 4 |
+ |
- |
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| 5 |
<< |
>> |
>>> |
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| 6 |
< |
> |
<= |
>=
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| 7 |
== |
!= |
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| 8 |
& |
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| 9 |
^ |
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| 10 |
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| 11 |
&& |
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| 12 |
|| |
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| 13 |
?: |
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| 14 |
= |
+= |
-+ |
*= |
/= |
%= |
<<= |
>>= |
>>>= |
&= |
^= |
!= |
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String Operators
Comparison Operators
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== |
Equal To |
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!= |
Not Equal To |
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< |
Less Than |
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> |
Greater Than |
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>= |
Greater than or equal to |
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<= |
Less than or equal to |
Arithmetic Operators
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* |
Multiplication |
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/ |
Division |
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+ |
Addition |
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- |
Subtraction |
Logical Operators
Assignment Operator
Keyword List
In JavaScript there are 50 keywords, this are reserve
word in the language you can not use this keyword in naming
of variable or function.
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abstract |
float |
public |
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boolean |
for |
return |
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break |
function |
short |
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byte |
goto |
static |
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case |
if |
super |
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catch |
implements |
switch |
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char |
import |
synchronized |
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class |
in |
this |
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const |
instanceof |
throw |
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continue |
int |
throws |
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default |
interface |
transient |
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do |
long |
true |
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double |
native |
try |
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else |
new |
var |
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extends |
null |
void |
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false |
package |
while |
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final |
private |
with |
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finally |
protected |
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Conditional Construct
1. if.. else ..
2. switch case
Looping Construct
1. for
2. while
User Define Function
function <functionname>(argument)
{
//function body
return <value>
}
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3. Java Script Objects
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C) Atanu Maity, 2006-200
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