محرر ويب أونلاين

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<!DOCTYPE html>
<html>
    <body>
        <script>
document.write(Math.log10(10000) + '<br>'); // 4
document.write(Math.log10(2) + '<br>');     // 0.3010299956639812
document.write(Math.log10(1) + '<br>');     // 0
document.write(Math.log10(0));              // -Infinity
        </script>
    </body>
</html>