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POHow come this line of code returns me an "undefined" then followed by a value
primarykey
Id
9662336
data
AcceptedAnswerId
9662562
AnswerCount
2
ClosedDate
CommentCount
5
CommunityOwnedDate
CreationDate
2012-03-12T05:53:48.287
FavoriteCount
0
LastActivityDate
2012-03-12T06:22:56.620
LastEditDate
2012-03-12T06:03:39.263
LastEditorUserId
962206
OwnerUserId
962206
ParentId
0
PostTypeId
1
Score
-2
ViewCount
149
LastEditorDisplayName
text
Body
<p>How come method equal always returns with an "undefined" followed by a number? and when I try to parse it. it returns me a NaN.</p> <pre><code><!DOCTYPE> <html> <head> <script> var fnum; var secondNum; var operation; function msg(val) { document.getElementById("fnumtext").value += val; fnum += val; } function showOperation(oper) { document.getElementById("fnumtext").value = ""; document.getElementById("operation").value = oper; operation = oper; } function equal() { secondNum = document.getElementById("fnumtext").value; alert(fnum); } </script> </head> <body> <input id = "fnumtext"type="text" name="firstnum" /><br /> <input id = "operation" type="text" name="secondnum" /><br /> <input type="button" value="1" onclick="msg('1')" /> <input type="button" value="2" onclick="msg('2')" /> <input type="button" value="3" onclick="msg('3')" /></br> <input type="button" value="4" onclick="msg('4')" /> <input type="button" value="5" onclick="msg('5')" /> <input type="button" value="6" onclick="msg('6')" /><br/> <input type="button" value="7" onclick="msg('7')" /> <input type="button" value="8" onclick="msg('8')" /> <input type="button" value="9" onclick="msg('9')" /></br> <input type="button" value="0" onclick="msg('0')" /></br> <input type="button" value="+" onclick="showOperation('+')" /> <input type="button" value="*" onclick="showOperation('*')" /> <input type="button" value="/" onclick="showOperation('/')" /> <input type="button" value="-" onclick="showOperation('-')" /> <input type="button" value="=" onclick="equal()" /> </body> </html> </code></pre>
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<javascript><html>
Title
How come this line of code returns me an "undefined" then followed by a value
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