      For example, to rapidly shift a value by a power of 10:
    </p>
    <pre>
x = new BigNumber('1234.000')      // '1234'
x.toExponential()                  // '1.234e+3'
x.c                                // '1,2,3,4'
x.e                                // 3

x.e = -5
x                                  // '0.00001234'</pre>
    <p>
      If changing the coefficient array directly, which is not recommended, be
      careful to avoid leading or trailing zeros (unless zero itself is being
      represented