ECMAScript variables - Revision history

Jayron32: merged with ECMAScript

2006-10-22T12:44:46Z

← Previous revision		Revision as of 12:44, 22 October 2006
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	~~{{merge-to\|~~ECMAScript}}		#REDIRECT[[ECMAScript#ECMAScript variables]]

	{{linkless-date\|September 2006}}
	Variables in ECMAScript are defined by using the var operator (short for variable), followed
	by the variable name, such as:
	var test = "hi";
	In this example, the variable test is declared and given an initialization value of "hi" (a string).
	Because ECMAScript is dynamicly typed, the interpreter automatically creates a string value for test
	without any explicit type declaration. You can also define two or more variables using the same var
	statement:
	var test = "hi", test2 = "hola";
	The previous code defines the variable test to have a value of "hi" and the variable test2 to have a
	value of "hola". Variables using the same var statement don’t have to be of the same type, however, as
	shown in the following:
	var test = "hi", age = 25;
	This example defines test (yet again) in addition to another variable named age that is set to the value
	of 25. Even though test and age are two different data types, this is perfectly legal in ECMAScript.
	Unlike Java, variables in ECMAScript do not require initialization (they are actually initialized behind
	the scenes, which I discuss later). Therefore, this line of code is valid:
	var test;
	Also unlike Java, variables can hold different types of values at different times; this is the advantage of
	loosely typed variables. A variable can be initialized with a string value, for instance, and later on be set
	to a number value, like this:
	var test = 'hi';
	alert(test); //outputs 'hi'
	//do something else here
	test = 55;
	alert(test); //outputs '55'
	This code outputs both the string and the number values without incident (or error). You can edit JavaScript by [http://www.yaldex.com/ JavaScript editor]. As mentioned previously,
	it is best coding practice for a variable to always contain a value of the same type throughout
	its use.
	<div class="messagebox cleanup metadata"> This article belongs in one or more '''[[Wikipedia:Category\|categories]]'''. Please [[Wikipedia:Categorization\|categorize]] this article to list it with similar topics.<br><small>Remove this template after categorizing. {{#if:September 2006\|This article has been tagged since '''September 2006'''.}}</small></div></div>{{#if:September 2006\|[[Category:Uncategorized from September 2006]]\|[[Category:Category needed]]}}

Gwern: correcting

2006-10-21T17:30:35Z

correcting

← Previous revision		Revision as of 17:30, 21 October 2006
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	{{linkless-date\|September 2006}}		{{linkless-date\|September 2006}}
	<h2>ECMAScript Variables</h2>

	Variables in ECMAScript are defined by using the var operator (short for variable), followed		Variables in ECMAScript are defined by using the var operator (short for variable), followed
	by the variable name, such as:		by the variable name, such as:
	var test = "hi";		var test = "hi";
	In this example, the variable test is declared and given an initialization value of "hi" (a string).		In this example, the variable test is declared and given an initialization value of "hi" (a string).
	Because ECMAScript is ~~loosely~~ typed, the interpreter automatically creates a string value for test		Because ECMAScript is dynamicly typed, the interpreter automatically creates a string value for test
	without any explicit type declaration. You can also define two or more variables using the same var		without any explicit type declaration. You can also define two or more variables using the same var
	statement:		statement:

Gwern: moved ECMAScript Variables to ECMAScript variables: decaps

2006-10-21T17:23:26Z

moved ECMAScript Variables to ECMAScript variables: decaps

← Previous revision	Revision as of 17:23, 21 October 2006
(No difference)

Jayron32 at 03:25, 29 September 2006

2006-09-29T03:25:47Z

← Previous revision		Revision as of 03:25, 29 September 2006
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	{{merge-to:ECMAScript}}		{{merge-to\|ECMAScript}}

	{{linkless-date\|September 2006}}		{{linkless-date\|September 2006}}

Jayron32: article should be merged with ECMAScript

2006-09-29T03:25:06Z

article should be merged with ECMAScript

← Previous revision		Revision as of 03:25, 29 September 2006
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			{{merge-to:ECMAScript}}

	{{linkless-date\|September 2006}}		{{linkless-date\|September 2006}}
	<h2>ECMAScript Variables</h2>		<h2>ECMAScript Variables</h2>

24.20.69.240: uncat and linkless

2006-09-27T07:28:58Z

uncat and linkless

← Previous revision		Revision as of 07:28, 27 September 2006
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			{{linkless-date\|September 2006}}
	<h2>ECMAScript Variables</h2>		<h2>ECMAScript Variables</h2>

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	it is best coding practice for a variable to always contain a value of the same type throughout		it is best coding practice for a variable to always contain a value of the same type throughout
	its use.		its use.
			<div class="messagebox cleanup metadata"> This article belongs in one or more '''[[Wikipedia:Category\|categories]]'''. Please [[Wikipedia:Categorization\|categorize]] this article to list it with similar topics.<br><small>Remove this template after categorizing. {{#if:September 2006\|This article has been tagged since '''September 2006'''.}}</small></div></div>{{#if:September 2006\|[[Category:Uncategorized from September 2006]]\|[[Category:Category needed]]}}

Mikefast at 07:27, 27 September 2006

2006-09-27T07:27:36Z

New page

<h2>ECMAScript Variables</h2>

Variables in ECMAScript are defined by using the var operator (short for variable), followed
by the variable name, such as:
var test = "hi";
In this example, the variable test is declared and given an initialization value of "hi" (a string).
Because ECMAScript is loosely typed, the interpreter automatically creates a string value for test
without any explicit type declaration. You can also define two or more variables using the same var
statement:
var test = "hi", test2 = "hola";
The previous code defines the variable test to have a value of "hi" and the variable test2 to have a
value of "hola". Variables using the same var statement don’t have to be of the same type, however, as
shown in the following:
var test = "hi", age = 25;
This example defines test (yet again) in addition to another variable named age that is set to the value
of 25. Even though test and age are two different data types, this is perfectly legal in ECMAScript.
Unlike Java, variables in ECMAScript do not require initialization (they are actually initialized behind
the scenes, which I discuss later). Therefore, this line of code is valid:
var test;
Also unlike Java, variables can hold different types of values at different times; this is the advantage of
loosely typed variables. A variable can be initialized with a string value, for instance, and later on be set
to a number value, like this:
var test = 'hi';
alert(test); //outputs 'hi'
//do something else here
test = 55;
alert(test); //outputs '55'
This code outputs both the string and the number values without incident (or error). You can edit JavaScript by [http://www.yaldex.com/ JavaScript editor]. As mentioned previously,
it is best coding practice for a variable to always contain a value of the same type throughout
its use.