Delphi Basics : RTL by starting letter : I

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Type	Name	Summary

Compiler Directive	$I	Allows code in an include file to be incorporated into a Unit
Compiler Directive	$IfDef	Executes code if a conditional symbol has been defined
Compiler Directive	$IfNDef	Executes code if a conditional symbol has not been defined
Compiler Directive	$IfOpt	Tests for the state of a Compiler directive
Compiler Directive	$Include	Allows code in an include file to be incorporated into a Unit
Compiler Directive	$IOChecks	When on, an IO operation error throws an exception
Keyword	If	Starts a conditional expression to determine what to do next
Keyword	Implementation	Starts the implementation (code) section of a Unit
Keyword	In	Used to test if a value is a member of a set
Procedure	Inc	Increment an ordinal variable
Function	IncDay	Increments a TDateTime variable by + or - number of days
Function	IncHour	Increments a TDateTime variable by + or - number of hours
Procedure	Include	Include a value in a set variable
Function	IncMillisecond	Increments a TDateTime variable by + or - number of milliseconds
Function	IncMinute	Increments a TDateTime variable by + or - number of minutes
Function	IncMonth	Increments a TDateTime variable by a number of months
Function	IncSecond	Increments a TDateTime variable by + or - number of seconds
Function	IncYear	Increments a TDateTime variable by a number of years
Directive	Index	Principally defines indexed class data properties
Constant	Infinity	Floating point value of infinite size
Keyword	Inherited	Used to call the parent class constructor or destructor method
Variable	Input	Defines the standard input text file
Function	InputBox	Display a dialog that asks for user text input, with default
Function	InputQuery	Display a dialog that asks for user text input
Procedure	Insert	Insert a string into another string
Function	Int	The integer part of a floating point number as a float
Type	Int64	A 64 bit sized integer - the largest in Delphi
Type	Integer	The basic Integer type
Keyword	Interface	Used for Unit external definitions, and as a Class skeleton
Function	IntToHex	Convert an Integer into a hexadecimal string
Function	IntToStr	Convert an integer into a string
Function	IOResult	Holds the return code of the last I/O operation
Keyword	Is	Tests whether an object is a certain class or ascendant
Function	IsInfinite	Checks whether a floating point number is infinite
Function	IsLeapYear	Returns true if a given calendar year is a leap year
Function	IsMultiThread	Returns true if the code is running multiple threads
Function	IsNaN	Checks to see if a floating point number holds a real number

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