Delphi Basics : RTL By functionality : : Number calculations

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Home | Numbers and sets : Number calculations

Type	Name	Summary

Function	Abs	Gives the absolute value of a number (-ve sign is removed)
Function	Addr	Gives the address of a variable, function or procedure
Keyword	And	Boolean and or bitwise and of two arguments
Function	CompareValue	Compare numeric values with a tolerance
Function	Copy	Create a copy of part of a string or an array
Function	DaysBetween	Gives the whole number of days between 2 dates
Function	DaySpan	Gives the fractional number of days between 2 dates
Procedure	Dec	Decrement an ordinal variable
Keyword	Div	Performs integer division, discarding the remainder
Procedure	Exclude	Exclude a value in a set variable
Function	Exp	Gives the exponent of a number
Procedure	FillChar	Fills out a section of storage with a fill character or byte value
Function	Frac	The fractional part of a floating point number
Function	Hi	Returns the hi-order byte of a (2 byte) Integer
Function	High	Returns the highest value of a type or variable
Keyword	In	Used to test if a value is a member of a set
Procedure	Inc	Increment an ordinal variable
Procedure	Include	Include a value in a set variable
Function	Int	The integer part of a floating point number as a float
Function	IsInfinite	Checks whether a floating point number is infinite
Function	IsNaN	Checks to see if a floating point number holds a real number
Function	Length	Return the number of elements in an array or string
Function	Lo	Returns the low-order byte of a (2 byte) Integer
Function	Low	Returns the lowest value of a type or variable
Function	Max	Gives the maximum of two integer values
Function	Mean	Gives the average for a set of numbers
Function	Min	Gives the minimum of two integer values
Keyword	Mod	Performs integer division, returning the remainder
Procedure	Move	Copy bytes of data from a source to a destination
Function	Odd	Tests whether an integer has an odd value
Keyword	Or	Boolean or or bitwise or of two arguments
Function	Ord	Provides the Ordinal value of an integer, character or enum
Function	PointsEqual	Compares two TPoint values for equality
Function	Pred	Decrement an ordinal variable
Function	PtInRect	Tests to see if a point lies within a rectangle
Function	Random	Generate a random floating point or integer number
Procedure	Randomize	Reposition the Random number generator next value
Function	RandomRange	Generate a random integer number within a supplied range
Variable	RandSeed	Reposition the Random number generator next value
Function	Rect	Create a TRect value from 2 points or 4 coordinates
Function	Round	Rounds a floating point number to an integer
Procedure	SetLength	Changes the size of a string, or the size(s) of an array
Keyword	Shl	Shift an integer value left by a number of bits
Keyword	Shr	Shift an integer value right by a number of bits
Function	SizeOf	Gives the storage byte size of a type or variable
Function	Slice	Creates a slice of an array as an Open Array parameter
Function	Sqr	Gives the square of a number
Function	Sqrt	Gives the square root of a number
Function	Succ	Increment an ordinal variable
Function	Sum	Return the sum of an array of floating point values
Function	Trunc	The integer part of a floating point number
Keyword	Xor	Boolean Xor or bitwise Xor of two arguments

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