function complexLog (c) {
    return c.log().div(Math.LN10)
  }
Calculate the 10-base logarithm of a value. This is the same as calculating `log(x, 10)`.

For matrices, the function is evaluated element wise.

Syntax:

   math.log10(x)

Examples:

   math.log10(0.00001)            // returns -5
   math.log10(10000)              // returns 4
   math.log(10000) / math.log(10) // returns 4
   math.pow(10, 4)                // returns 10000

See also:

   exp, log, log1p, log2

@param {number | BigNumber | Complex | Array | Matrix} x
           Value for which to calculate the logarithm.
@return {number | BigNumber | Complex | Array | Matrix}
           Returns the 10-base logarithm of `x`