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<html> <body> <script type="text/javascript"> var x; x=5+5; document.write(x); document.write("<br />"); x="5"+"5"; document.write(x); document.write("<br />"); x=5+"5"; document.write(x); document.write("<br />"); x="5"+5; document.write(x); document.write("<br />"); </script> <p>The rule is: If you add a number and a string, the result will be a string.</p> </body> </html>
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