document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=849323>Question 849323</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please explain <BR>\n" );
document.write( "if a=5,<BR>\n" );
document.write( "b=3;\r<BR>\n" );
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document.write( "then,\r<BR>\n" );
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document.write( "a^=b^=a^=b\r<BR>\n" );
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document.write( "result: a=3, b=5; (Swap)<BR>\n" );
document.write( "please explain it... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #511484 by </B><A HREF=/tutors/aboutme.mpl?userid=swincher4391><B>swincher4391(1107)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=swincher4391><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=swincher4391><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=511484\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sounds like this is C.\r<BR>\n" );
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document.write( "So if we have a =5 and b =3,\r<BR>\n" );
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document.write( "we apply an XOR assignment operator. \r<BR>\n" );
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document.write( "b = a XOR b  \r<BR>\n" );
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document.write( "So take 3 XOR 5 for instance. We write each in its 4-bit form\r<BR>\n" );
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document.write( "a = 3 XOR 5 <BR>\n" );
document.write( "(0011)(0101) = (0110) = 6\r<BR>\n" );
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document.write( "Now b = 3 a = 6\r<BR>\n" );
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document.write( "b = 6 XOR 3<BR>\n" );
document.write( "(0110)(0011) = (0101) = 5\r<BR>\n" );
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document.write( "b = 5 a = 6\r<BR>\n" );
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document.write( "a = 6 XOR 5\r<BR>\n" );
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document.write( "(0110)(0101) = (0011) = 3\r<BR>\n" );
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document.write( "a = 3 b = 5\r<BR>\n" );
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document.write( "To understand what XOR means think of 1 and 0 as true and false. Know the truth table for XOR. It looks like OR but instead TT = F [the exclusive condition] which is why we call it an exclusive or.\r<BR>\n" );
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document.write( "Check out this page http://betterexplained.com/articles/swap-two-variables-using-xor/<BR>\n" );
document.write( "Let me know if you have any questions!\r<BR>\n" );
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document.write( "-Devin </SPAN>\n" );
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