http://wbex.ru/index.php?action=history&feed=atom&title=JavaScript_DHTML%2FLanguage_Basics%2FOperator
JavaScript DHTML/Language Basics/Operator - История изменений
2026-04-04T15:33:16Z
История изменений этой страницы в вики
MediaWiki 1.30.0
http://wbex.ru/index.php?title=JavaScript_DHTML/Language_Basics/Operator&diff=3108&oldid=prev
в 09:59, 26 мая 2010
2010-05-26T09:59:54Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<tr style="vertical-align: top;" lang="ru">
<td colspan="1" style="background-color: white; color:black; text-align: center;">← Предыдущая</td>
<td colspan="1" style="background-color: white; color:black; text-align: center;">Версия 09:59, 26 мая 2010</td>
</tr><tr><td colspan="2" style="text-align: center;" lang="ru"><div class="mw-diff-empty">(нет различий)</div>
</td></tr></table>
http://wbex.ru/index.php?title=JavaScript_DHTML/Language_Basics/Operator&diff=3109&oldid=prev
Admin: 1 версия
2010-05-26T07:24:28Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==Add two integer variables together==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var a = 6, b = 4; <br />
alert(a + b);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Examples of Increment and Decrement Operators==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>JavaScript Unleashed</title><br />
</head><br />
<body><br />
<br />
<script type="text/javaScript"><br />
<!--<br />
var i = 0; <br />
var result = 0<br />
<br />
document.write("If i = 0, ");<br />
document.write("i returns the value of i");<br />
document.write(" after incrementing : ");<br />
<br />
// Increment prefix<br />
result = ++i; <br />
<br />
document.write(result);<br />
i = 0; <br />
document.write("<br>i++ returns the value of i");<br />
document.write(" before incrementing : ");<br />
<br />
// Increment suffix<br />
result = i++; <br />
document.write(result);<br />
i = 0; <br />
document.write("<br>--i returns the value of i");<br />
document.write(" after decrementing : ");<br />
<br />
// Decrement prefix<br />
result = --i; <br />
document.write(result)<br />
<br />
i = 0;<br />
document.write("<br>i-- returns the value of i");<br />
document.write(" before decrementing : ");<br />
// Decrement suffix<br />
result = i--;<br />
<br />
document.write(result);<br />
// --><br />
</script><br />
<br />
</body><br />
</html><br />
<br />
<br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==JavaScript compound divide assignment==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var x = 6; <br />
alert(x /= 2);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==JavaScript compound multiply assignment==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var x = 6; <br />
alert(x *= 2);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==JavaScript compound plus assignment==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var x = 6; <br />
alert(x += 2);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==JavaScript compound subtraction assignment==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var x = 6; <br />
alert(x -= 2);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Modular operation (remainder in division)==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var a = 6, b = 4; <br />
alert(a % b);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Multiply two integer variables together==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var a = 6, b = 3; <br />
alert(a * b);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Operators and Expressions:Operator Summary Table==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>JavaScript Operators</title><br />
</head><br />
<body><br />
<h1>JavaScript Operators</h1><br />
<table BORDER="2" CELLPADDING="4" ALIGN="CENTER"><br />
<tr><td>Category</td><br />
<td>Operator</td><br />
<td>Description</td><br />
<td>Usage Example</td><br />
<td>Value/Result</td></tr><br />
<tr><td>String</td><br />
<td>+</td><br />
<td>concatenation</td><br />
<td>&quot;Java&quot; + &quot;Script&quot;</td><br />
<td><script><!--<br />
document.write("Java"+"Script")<br />
// --></script><br />
</td></tr><br />
<tr><td ROWSPAN="10">Arithmetic</td><br />
<td>+</td><br />
<td>addition</td><br />
<td>3 + 3</td><br />
<td><script><!--<br />
document.write(3+3)<br />
// --></script><br />
</td></tr><br />
<tr><td ROWSPAN="2">-</td><br />
<td>subtraction</td><br />
<td>6 - 2</td><br />
<td><script><!--<br />
document.write(6-2)<br />
// --></script><br />
</td></tr><br />
<tr><td>unary negation</td><br />
<td>-4</td><br />
<td><script><!--<br />
document.write(-4)<br />
// --></script><br />
</td></tr><br />
<tr><td>*</td><br />
<td>multiplication</td><br />
<td>4 * 4</td><br />
<td><script><!--<br />
document.write(4*4)<br />
// --></script><br />
</td></tr><br />
<tr><td>/</td><br />
<td>division</td><br />
<td>15/5</td><br />
<td><script><!--<br />
document.write(15/5)<br />
// --></script><br />
</td></tr><br />
<tr><td>%</td><br />
<td>modulus</td><br />
<td>22%7</td><br />
<td><script><!--<br />
document.write(22%7)<br />
// --></script><br />
</td></tr><br />
<tr><td ROWSPAN="2">++</td><br />
<td>increment and then return value</td><br />
<td>x=4; ++x</td><br />
<td><script><!--<br />
x=4<br />
document.write(++x)<br />
// --></script><br />
</td></tr><br />
<tr><td>return value and then increment</td><br />
<td>x=4; x++</td><br />
<td><script><!--<br />
x=4<br />
document.write(x++)<br />
// --></script><br />
</td></tr><br />
<tr><td ROWSPAN="2">--</td><br />
<td>decrement and then return value</td><br />
<td>x=3; --x</td><br />
<td><script><!--<br />
x=3<br />
document.write(--x)<br />
// --></script><br />
</td></tr><br />
<tr><td>return value and then decrement</td><br />
<td>x=4; x--</td><br />
<td><script><!--<br />
x=4<br />
document.write(x--)<br />
// --></script><br />
</td></tr><br />
<tr><td ROWSPAN="6">Bit Manipulation</td><br />
<td>&amp;</td><br />
<td>and</td><br />
<td>11 &amp; 7</td><br />
<td><script><!--<br />
document.write(11&7)<br />
// --></script><br />
</td></tr><br />
<tr><td>|</td><br />
<td>or</td><br />
<td>8 | 7</td><br />
<td><script><!--<br />
document.write(8|7)<br />
// --></script><br />
</td></tr><br />
<tr><td>^</td><br />
<td>exclusive or</td><br />
<td>1 ^ 7</td><br />
<td><script><!--<br />
document.write(1^7)<br />
// --></script><br />
</td></tr><br />
<tr><td>&lt;&lt;</td><br />
<td>left shift</td><br />
<td>8 &lt;&lt; 3</td><br />
<td><script><!--<br />
document.write(8 << 3)<br />
// --></script><br />
</td></tr><br />
<tr><td>&gt;&gt;</td><br />
<td>sign-propagating right shift</td><br />
<td>-3 &gt;&gt; 2</td><br />
<td><script><!--<br />
document.write(-3 >> 2)<br />
// --></script><br />
</td></tr><br />
<tr><td>&gt;&gt;&gt;</td><br />
<td>zero-fill right shift</td><br />
<td>-7 &gt;&gt;&gt; 3</td><br />
<td><script><!--<br />
document.write(-7>>>3)<br />
// --></script><br />
</td></tr><br />
<tr><td ROWSPAN="3">Logical</td><br />
<td>&amp;&amp;</td><br />
<td>logical and</td><br />
<td>true &amp;&amp; false</td><br />
<td><script><!--<br />
document.write(true&&false)<br />
// --></script><br />
</td></tr><br />
<tr><td>||</td><br />
<td>logical or</td><br />
<td>true || false</td><br />
<td><script><!--<br />
document.write(true||false)<br />
// --></script><br />
</td></tr><br />
<tr><td>!</td><br />
<td>not</td><br />
<td>!true</td><br />
<td><script><!--<br />
document.write(!true)<br />
// --></script><br />
</td></tr><br />
<tr><td ROWSPAN="6">Comparison</td><br />
<td>==</td><br />
<td>equal</td><br />
<td>3 == 7</td><br />
<td><script><!--<br />
document.write(3==7)<br />
// --></script><br />
</td></tr><br />
<tr><td>!=</td><br />
<td>not equal</td><br />
<td>3 != 7</td><br />
<td><script><!--<br />
document.write(3!=7)<br />
// --></script><br />
</td></tr><br />
<tr><td>&lt;</td><br />
<td>less than</td><br />
<td>3 &lt; 7</td><br />
<td><script><!--<br />
document.write(3<7)<br />
// --></script><br />
</td></tr><br />
<tr><td>&lt;=</td><br />
<td>less than or equal</td><br />
<td>3 &lt;= 7</td><br />
<td><script><!--<br />
document.write(3<=7)<br />
// --></script><br />
</td></tr><br />
<tr><td>&gt;</td><br />
<td>greater than</td><br />
<td>3 &gt; 7</td><br />
<td><script><!--<br />
document.write(3>7)<br />
// --></script><br />
</td></tr><br />
<tr><td>&gt;=</td><br />
<td>greater than or equal</td><br />
<td>3 &gt;= 7</td><br />
<td><script><!--<br />
document.write(3>7)<br />
// --></script><br />
</td></tr><br />
<tr><td>Conditional Expression</td><br />
<td>(condition) ? value1 : value2</td><br />
<td>if condition is true then value1 else value2</td><br />
<td>true ? 3 : 7</td><br />
<td><script><!--<br />
document.write(true?3:7)<br />
// --></script><br />
</td></tr><br />
</table><br />
</body><br />
</html><br />
<br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Postfix adding==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var a = 6, b = 2; <br />
alert(a++ + b);<br />
alert(a);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Postfix operator for integer==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<br />
<html><br />
<head><br />
<title></title><br />
</head><br />
<body><br />
<script type="text/javascript"><br />
var theNum = 1;<br />
document.write(theNum+"<BR>");<br />
document.write(theNum++);<br />
<br />
</script><br />
</body><br />
</html><br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Postfix subtraction==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var a = 6, b = 2; <br />
alert(a-- + b);<br />
alert(a);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Prefix operator for integer==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title></title><br />
</head><br />
<body><br />
<script type="text/javascript"><br />
var theNum = 1;<br />
document.write(theNum+"<BR>");<br />
document.write(++theNum+"<BR>");<br />
document.write(theNum+"<BR>");<br />
</script><br />
</body><br />
</html><br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Prefix plus==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var a = 6, b = 2; <br />
alert(++a + b);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Prefix subtraction==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var a = 6, b = 2; <br />
alert(--a + b);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Subtract one integer variable from another integer variable==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var a = 6, b = 4; <br />
alert(a - b);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Tenary operator==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<br />
<html><br />
<head><br />
<title></title><br />
</head><br />
<body><br />
<script type="text/javascript"><br />
var temp = prompt("Number");<br />
temp > 100 ? alert("> 100") : alert("< 100");<br />
</script><br />
</body><br />
</html><br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Ternary operator==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
var w = 1, x = 2, y = 3, z = 4, ans; <br />
ans = (w > x) ? y : z<br />
alert(ans);<br />
</script><br />
</head><br />
<body><br />
</body><br />
</html><br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Using the Equal Operator==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<html><br />
<head><br />
<title>Using the Equal Operator</title><br />
</head><br />
<body> <script type="text/javascript"><br />
<!--<br />
var x = 5;<br />
var y = 5;<br />
var z = 10;<br />
document.write("x = " + x + "<br>");<br />
document.write("y = " + y + "<br>");<br />
document.write("z = " + z + "<br>");<br />
document.write("Is x equal to y,(x == y)? ");<br />
document.write(x == y);<br />
document.write("<br>Is y equal to z,(y == z)? ");<br />
document.writeln(y == z);<br />
// --><br />
</script><br />
<br />
</body><br />
</html><br />
<br />
<br />
<br />
<br />
</source><br />
<br />
<br />
<br />
<br />
==Working with the Increment Operator==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<br />
<HTML><br />
<BODY><br />
<H1><br />
<SCRIPT> <br />
var Inc = 1; <br />
document.write("Starting value of " + Inc + "<BR>"); <br />
document.write("IncPreFix " + ++Inc + "<BR>"); <br />
document.write("IncPostFix " + Inc++ + "<BR>"); <br />
document.write("Ending value of " + Inc); <br />
</script><br />
</H1><br />
</BODY><br />
</HTML><br />
<br />
<br />
<br />
</source></div>
Admin