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<!DOCTYPE html> <html> <body> <p>The toPrecision() method returns a string, with a number written with a specified length:</p> <p id="demo"></p> <script> var x = 9.656; document.getElementById("demo").innerHTML = x.toPrecision() + "<br>" + x.toPrecision(2) + "<br>" + x.toPrecision(4) + "<br>" + x.toPrecision(6); </script> </body> </html>