Function roundDecimal( x, dp )

Description:
Rounds a value to a given number of decimal places. The result is a float (32-bit floating point value), so this is only suitable for relatively low-precision values. It's intended for truncating the number of apparent significant figures represented by a value which you know has been obtained by combining other values of limited precision. For more control, see the functions in the Formats class.
Parameters:
x (floating point)
a floating point value
dp (integer)
number of decimal places (digits after the decimal point) to retain
Return Value (floating point):
floating point value close to x but with a limited apparent precision
Example:
roundDecimal(PI,2) = 3.14f
Signature:
float roundDecimal(double, int)