DLabPascal - Predefined Constants

The following constants are defined as return values of the MessageDlg function:

Identifier	Value	Description
mrNone	0	no response
mrOk	1	user clicked the "OK" button
mrCancel	2	"cancel" button
mrAbort	3	"abort" button
mrRetry	4	"retry" button
mrIgnore	5	"ignore" button
mrYes	6	"yes" button
mrNo	7	"no" button
mrClose	8	"close" button
mrAll	12	"all" button
mrYesToAll	13	"yes to all" button
mrNoToAll	14	"no to all" button

Identifier	Value	Description
uc_e	2.718281828459045235360	Euler's number e
uc_etom1	0.367879441171442321596	1/e
uc_lg2	0.301029995663981195214	common logarithm of 2
uc_lg5	0.698970004336018804803	common logarithm of 5
uc_lge	0.434294481903251827651	common logarithm of e
uc_lgPi	0.497149872694133854351	common logarithm of Pi
uc_ln10	2.302585092994045684018	natural logarithm of 10
uc_ln2	0.693147180559945309417	natural logarithm of 2
uc_lnPi	1.144729885849400174143	natural logarithm of Pi
uc_PiH	1.570796326794896619231	Pi/2 (1)
uc_PiSqr	9.869604401089358618834	Pi*Pi
uc_Pitom1	0.318309886183790671538	1/Pi
uc_sqrt2	1.414213562373095048802	square root of 2
uc_sqrt2pi	2.506628274631000502416	square root of 2*Pi
uc_sqrt2pitom1	0.3989422804014326779399	1/(square root of 2*Pi)
uc_MaxSingle	3.4e38	maximum single number
uc_MaxDouble	1.7e308	maximum double number
uc_MaxExtended	1.1e4932	maximum extended number
uc_MinSingle	1.5e-45	minimum single number
uc_MinDouble	5.0e-324	minimum double number
uc_MinExtended	3.6e-4951	minimum extended number

The following constants are system-wide constants of DataLab:

Identifier	Value	Description
MAXCLASSES	127	max. number of supported classes
MAXNOMINALIDS	150	max. number of supported nominal identifiers in TDataTable
MAXPOLFITORDER	10	max. order of polynomial fit in CalcPolyFit and CalcCenteredPolyFit

(1)	Please note that for syntactical reasons the numerical value of p (pi = 3.14159...) is not defined as a constant ("uc_pi") but as a function (pi).