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JavaScript Tutorial/Function/Function Return - История изменений
2026-04-04T19:05:48Z
История изменений этой страницы в вики
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Admin: 1 версия
2010-05-26T08:24:46Z
<p>1 версия</p>
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<td colspan="1" style="background-color: white; color:black; text-align: center;">Версия 08:24, 26 мая 2010</td>
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Admin
http://wbex.ru/index.php?title=JavaScript_Tutorial/Function/Function_Return&diff=9086&oldid=prev
в 18:52, 25 мая 2010
2010-05-25T18:52:56Z
<p></p>
<p><b>Новая страница</b></p><div>== return==<br />
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<p>The return keyword will exit the existing function and return a value.</p><br />
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<!-- start source code --><br />
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<source lang="javascript"><br />
<html><br />
<body><br />
<script language="JavaScript"><br />
<!--<br />
function getValue(){<br />
var myValue = 4*3;<br />
return myValue;<br />
}<br />
function fill(){<br />
var x = getValue();<br />
document.form1.tmp.value = x;<br />
}<br />
--><br />
</script><br />
<form name="form1"><br />
Value: <input type="text" Name="tmp" Size=5><br />
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<input type="button" name="get" value="Get Returned Value" onClick="fill()"><br />
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</form><br />
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== Return an array from a function==<br />
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<source lang="javascript"><br />
<HTML><br />
<HEAD><br />
<TITLE><br />
Iteration Two<br />
</TITLE><br />
<SCRIPT><br />
function makeArray() {<br />
var myArray = new Array(4);<br />
myArray[0] = "A";<br />
myArray[1] = "B";<br />
myArray[2] = "C";<br />
myArray[3] = "D";<br />
return myArray;<br />
}<br />
function showArray(theArray){<br />
var quote = "";<br />
for (var i = 0; i < theArray.length; i++){<br />
quote += theArray[i] + " ";<br />
}<br />
return quote; <br />
}<br />
</SCRIPT><br />
</HEAD><br />
<BODY><br />
<H1><br />
<SCRIPT><br />
var x = makeArray();<br />
document.write(showArray(x));<br />
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</H1><br />
</BODY><br />
</HTML></source><br />
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== Return boolean value from function==<br />
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<source lang="javascript"><br />
<html><br />
<head><br />
<script Language="Javascript" type = "text/javascript"><br />
<!--<br />
var newurl<br />
function CheckRequest(newurl)<br />
{<br />
if (confirm("Do you want to visit " + newurl + " site.")) {<br />
return true;<br />
} else {<br />
return false;<br />
}<br />
}<br />
//--><br />
</script><br />
<title>Capturing Links</title><br />
</head><br />
<P><A href="http://www.wbex.ru" onClick = "return CheckRequest("wbex")">Java</A></P><br />
<P><A href="http://www.netscape.ru" onClick = "return CheckRequest("Netscape")">Netscape</A></P><br />
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== Returning Values==<br />
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<p>JavaScript provides a return statement to return a value.</p><br />
<p>The value to be returned is placed after the keyword return.</p><br />
<p>The "undefined" value is returned from a function if no value is specified after the keyword return or if the return statement is not used.</p><br />
<p>A value returned from a function can be assigned to a variable or used within an expression.</p><br />
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<!-- start source code --><br />
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<source lang="javascript"><br />
<html><br />
<SCRIPT LANGUAGE="JavaScript"><br />
<!--<br />
function multiplyByFive(aNumber)<br />
{<br />
return aNumber*5;<br />
}<br />
document.write("3*5=",multiplyByFive(3));<br />
//--><br />
</SCRIPT><br />
</html></source><br />
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== Return value from a function==<br />
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<source lang="javascript"><br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
<!--<br />
function calcAvg()<br />
{<br />
var inpNum1 = 1;<br />
var inpNum2 = 2;<br />
var inpNum3 = 3;<br />
var inpNum4 = 4;<br />
numAvg = doCalcAvg(inpNum1, inpNum2, inpNum3, inpNum4);<br />
document.write("The average of the four numbers you entered is: " + numAvg);<br />
}<br />
function doCalcAvg(inpNum1, inpNum2, inpNum3, inpNum4)<br />
{<br />
var ans;<br />
ans = (Number(inpNum1) + Number(inpNum2) + Number(inpNum3) + Number(inpNum4)) / 4;<br />
return (ans);<br />
}<br />
// --><br />
</script><br />
</head><br />
<body onLoad="calcAvg();"><br />
</body><br />
</html></source></div>