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<p>The toExponential() method returns a string, with the number rounded and written using exponential notation.</p>
<p>An optional parameter defines the number of digits behind the decimal point.</p>
<p id="demo"></p>
<script>
var x = 9.656;
document.getElementById("demo").innerHTML =
x.toExponential() + "<br>" +
x.toExponential(2) + "<br>" +
x.toExponential(4) + "<br>" +
x.toExponential(6);
</script>
</body>
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