operator
Library: Floating point number support (OMFLOAT)
Import : omfloat.xmd Library: Binary coded decimal numbers (OMBCD) Import : ombcd.xmd |
Returns: e raised to the power of x. |
define overloaded external float function exp value float x define overloaded external bcd function exp value bcd x
Argument definitions
Use exp to calculate the value of e raised to the power of either a floating point number or a BCD number.
To use ombcd or omfloat, you must import the module into your program using a statement like one of these two:
import "ombcd.xmd" unprefixed
import "omfloat.xmd" unprefixed
(Please see the import
topic
for more on importing.)
e is Euler's number, and is approximately equal to 2.71828182845904523536028747135 ...
You use BCD mathematics typically for financial calculations and floating point mathematics typically for extremely large numbers.
You calculate the value of e raised to the argument of exp, as in
set my-value to exp (x)
If the result of an exponential value does not fit in the data type of the argument, the value returned is truncated to fit the data type.
If you take the exponential value of an integer, you need to coerce the integer - to a floating point or BCD number - so that the appropriate function is called. The result will depend on which exponential function is called.
In OmniMark, always surround operators with spaces.
; Displays e to the power of 2 as a BCD import "ombcd.xmd" unprefixed process local bcd x initial {"2.3025850929940461"} local bcd result set result to exp (x) output "e to the power of " || "d" % x || " = " || "d" % result || "%n" ; Output: "e to the power of 2.3025850929940461 = 10.0000000000000002"
; Displays the value of e to the power of 2 as a floating point number. import "omfloat.xmd" unprefixed process local float x initial {"2.3025850929940461"} local float result set result to exp (x) output "e to the power of " || "d" % x || " = " || "d" % result || "%n" ; Output: "e to the power of 2.3025850929940461 = 10"
In the example above, instead of using the line set result to exp (x)
, you could have written set result to e ** x
.