The value which is more closer than any other to the e, the base of the natural logarithms.

1 math.e

<math.e />
Example
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<xsql-script name='sqrt_sample1'>
    <body>
        <println><math.e /></println>        -->E = 2.718281828459045
    </body>
</xsql-script>
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It returns us e (2.718281828459045) qith a precision of 16 decimals.