function exp10( x ) {
	return addon( x );
}
Returns `10` raised to the `x` power.

@private
@param {number} x - input value
@returns {number} function value

@example
var v = exp10( 3.0 );
// returns 1000.0

@example
var v = exp10( -9.0 );
// returns 1.0e-9

@example
var v = exp10( 0.0 );
// returns 1.0

@example
var v = exp10( NaN );
// returns NaN