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Functional Keyword List
Paul Squires edited this page Oct 19, 2026
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Home › Functional Keyword List
List of FreeBASIC keywords sorted by the function they perform.
Arrays
- Arraylen
- Arraysize
- Erase
- Fbarray (Array Descriptor Structure And Access)
- LBound
- ReDim
- Preserve
- UBound
Bit manipulation
Compiler switches
Console
- ? (Shortcut For 'Print')
- ? Using (Shortcut For 'Print Using')
- Beep
- Cls
- Color
- CsrLin
- Locate
- Open Cons
- Open Err
- Open Pipe
- Open Scrn
- Pos
- Print Using
- Screen (Console)
- Spc
- Tab
- View (Console)
- Width
- Write
Data types and declarations
- Alias (Modifier)
- As
- Boolean
- Byref (Variables)
- Byte
- Class
- Const
- Const (Qualifier)
- Dim
- Double
- Enum
- Extends
- Extends Wstring
- Extends Zstring
- Function (Pointer)
- Implements
- Integer
- Long
- LongInt
- Object
- Scope
- Shared
- Short
- Single
- Static
- String
- Sub (Pointer)
- Type
- Type (Alias)
- Type (Temporary)
- UByte
- UInteger
- ULong
- ULongInt
- Union
- Unsigned
- UShort
- Var
- With
- WString
- ZString
Date and time
- Date
- DateAdd
- DateDiff
- DatePart
- DateSerial
- DateValue
- Day
- Hour
- IsDate
- Minute
- Month
- MonthName
- Now
- Second
- SetDate
- SetTime
- Time
- TimeSerial
- TimeValue
- Timer
- Year
- Weekday
- WeekdayName
Debug support
Error handling
Files
- ? # (Shortcut For 'Print #')
- Access
- Append
- Binary
- BLoad
- BSave
- Close
- Encoding
- EOF
- FreeFile
- Get # (File I/O)
- Input (File I/O)
- Input #
- Line Input #
- LOC
- Lock
- LOF
- Open
- Output
- Print #
- Put # (File I/O)
- Random
- Read (File Access)
- Read Write (File Access)
- Reset
- Seek (Statement)
- Seek (Function)
- Unlock
- Write #
- Write (File Access)
Graphics
- Add (Graphics Put)
- Alpha (Graphics Put)
- And (Graphics Put)
- Circle
- Cls
- Color
- Custom (Graphics Put)
- Draw
- Draw String
- Event (Message Data From Screenevent)
- Flip
- Get (Graphics)
- ImageConvertRow
- ImageCreate
- ImageDestroy
- ImageInfo
- Line
- Or (Graphics Put)
- Paint
- Palette
- PCopy
- PMap
- Point
- PointCoord
- PReset
- PSet
- Pset (Graphics Put)
- Put (Graphics)
- RGB
- RGBA
- Screen (Graphics)
- ScreenControl
- ScreenCopy
- ScreenEvent
- ScreenInfo
- ScreenGLProc
- ScreenList
- ScreenLock
- ScreenPtr
- ScreenRes
- ScreenSet
- ScreenSync
- ScreenUnlock
- Trans (Graphics Put)
- View (Graphics)
- Window
- Xor (Graphics Put)
Hardware access
Assignment Operators
- =[>] (Assignment)
- &= (Concatenate And Assign)
- += (Add And Assign)
- -= (Subtract And Assign)
- *= (Multiply And Assign)
- /= (Divide And Assign)
- \= (Integer Divide And Assign)
- ^= (Exponentiate And Assign)
- Mod= (Modulus And Assign)
- And= (Conjunction And Assign)
- Eqv= (Equivalence And Assign)
- Imp= (Implication And Assign)
- Or= (Inclusive Disjunction And Assign)
- Xor= (Exclusive Disjunction And Assign)
- Shl= (Shift Left And Assign)
- Shr= (Shift Right And Assign)
- Let (Assignment)
- Let() (Assignment)
Arithmetic Operators
- + (Add)
- - (Subtract)
- * (Multiply)
- / (Divide)
- \ (Integer Divide)
- ^ (Exponentiate)
- Mod (Modulus)
- - (Negate)
- Shl (Shift Left)
- Shr (Shift Right)
Bitwise operators
Short Circuit operators
Math
Memory
- Allocate
- CAllocate
- Clear
- Deallocate
- Delete
- Fb_Memcopy
- fb_MemCopyClear
- Fb_Memmove
- Field
- Fre
- New
- Peek
- Poke
- Reallocate
Meta Commands
Miscellaneous
- Asm
- Data
- End (Block)
- Is (Run-Time Type Information Operator)
- Let
- OffsetOf
- Option()
- To
- Read
- Rem
- Restore
- SizeOf
- Swap
- TypeOf
Modularizing
- Common
- DyLibFree
- DyLibLoad
- DyLibSymbol
- Export
- Extern
- Extern...End Extern
- Import
- Namespace
- Private
- Public
- Using (Namespaces)
Multithreading
- CondBroadcast
- CondCreate
- CondDestroy
- CondSignal
- CondWait
- MutexCreate
- MutexDestroy
- MutexLock
- MutexUnlock
- ThreadCall
- ThreadCreate
- ThreadDetach
- ThreadSelf
- ThreadWait
OS / shell
- Chain
- ChDir
- Command
- CurDir
- Dir
- End (Statement)
- Environ
- Exec
- ExePath
- FileAttr
- FileCopy
- FileDateTime
- FileExists
- FileFlush
- FileSetEof
- FileLen
- IsRedirected
- Kill
- MkDir
- Name
- RmDir
- Run
- SetEnviron
- Shell
- System
- WindowTitle
Pointers
Predefined symbols
- __DATE__
- __DATE_ISO__
- __FB_64BIT__
- __FB_ANDROID__
- __FB_ARG_COUNT__
- __FB_ARG_EXTRACT__
- __FB_ARG_LEFTOF__
- __Fb_Arg_Listexpand__
- __FB_ARG_RIGHTOF__
- __FB_ARGC__
- __FB_ARGV__
- __FB_ARM__
- __FB_ASM__
- __FB_BACKEND__
- __FB_BIGENDIAN__
- __FB_BUILD_DATE__
- __FB_BUILD_DATE_ISO__
- __FB_BUILD_FORK_ID__
- __FB_BUILD_SHA1__
- __FB_CYGWIN__
- __FB_DARWIN__
- __FB_DOS__
- __FB_ERR__
- __FB_EVAL__
- __FB_FPMODE__
- __FB_FPU__
- __FB_FREEBSD__
- __FB_GCC__
- __FB_GUI__
- __FB_IIF__
- __FB_JOIN__
- __FB_JS__
- __FB_LANG__
- __FB_LINUX__
- __FB_MAIN__
- __FB_MIN_VERSION__
- __FB_MT__
- __FB_NETBSD__
- __FB_OPENBSD__
- __FB_OPTIMIZE__
- __FB_OPTION_BYVAL__
- __FB_OPTION_DYNAMIC__
- __FB_OPTION_ESCAPE__
- __FB_OPTION_EXPLICIT__
- __FB_OPTION_GOSUB__
- __FB_OPTION_PRIVATE__
- __FB_OPTION_PROFILE__
- __FB_OUT_DLL__
- __FB_OUT_EXE__
- __FB_OUT_LIB__
- __FB_OUT_OBJ__
- __FB_PCOS__
- __FB_PPC__
- __FB_PROFILE__
- __Fb_Query_Symbol__
- __FB_QUOTE__
- __FB_SIGNATURE__
- __FB_SSE__
- __FB_UNIQUEID__
- __FB_UNIQUEID_POP__
- __FB_UNIQUEID_PUSH__
- __FB_UNIX__
- __FB_UNQUOTE__
- __FB_VECTORIZE__
- __FB_VER_MAJOR__
- __FB_VER_MINOR__
- __FB_VER_PATCH__
- __FB_VERSION__
- __FB_WIN32__
- __FB_XBOX__
- __FB_X86__
- __FILE__
- __FILE_NQ__
- __FUNCTION__
- __FUNCTION_NQ__
- __LINE__
- __PATH__
- __TIME__
- False
- True
Preprocessor
- #assert
- #define
- #else
- #elseif
- #elseifdef
- #elseifndef
- #endif
- #endmacro
- #error
- #if
- #ifdef
- #ifndef
- #inclib
- #include
- #libpath
- #lang
- #line
- #macro
- #pragma
- #Pragma Reserve
- #undef
- defined
- Once
Procedures
- Abstract (Member)
- Alias
- Any
- Base (Initialization)
- Base (Member Access)
- Byref (Parameters)
- Byref (Function Results)
- ByVal
- Call
- cdecl
- Const (Member)
- Constructor
- Constructor (Module)
- Destructor
- Destructor (Module)
- Declare
- Fastcall
- Function
- Function (Member)
- Lib
- Naked
- Operator
- Overload
- Override
- pascal
- Private (Member)
- Protected (Member)
- Property
- Public (Member)
- Static (Member)
- Sub
- Sub (Member)
- stdcall
- This
- Thiscall
- Virtual (Member)
Variadic Procedures
Program flow
- Continue
- Case
- Do
- Do...Loop
- Else
- ElseIf
- End If
- Exit
- GoSub
- Goto
- If...Then
- IIf
- Is (Select Case)
- For
- For...Next
- Loop
- Next
- On...Gosub
- On...Goto
- Return (From Procedure)
- Return (From Gosub)
- Select Case
- Sleep
- Step
- Then
- Until
- Wend (Or 'End While')
- While
- While...Wend (Or 'While...End While')
String functions
- InStr
- InStrRev
- LCase
- Left
- Len
- LSet
- LTrim
- Mid (Statement)
- Mid (Function)
- Right
- RSet
- RTrim
- Space
- String (Function)
- Trim
- UCase
- WSpace
- Wstring (Function)
String and number conversion
- Asc
- Bin
- Chr
- CVD
- CVI
- CVL
- CVLongInt
- CVS
- CVShort
- Format
- Hex
- MKD
- MKI
- MKL
- MKLongInt
- MKS
- MKShort
- Oct
- Str
- Val
- ValLng
- ValInt
- ValUInt
- ValULng
- WBin
- WChr
- WHex
- WOct
- WStr
Type casting/conversion
- Cast
- CBool
- CByte
- CDbl
- CInt
- CLng
- CLngInt
- CPtr
- CShort
- CSign
- CSng
- CUByte
- CUInt
- CULng
- CULngInt
- CUnsg
- CUShort
User input
- GetJoystick
- GetKey
- GetMouse
- Inkey
- Input()
- Input (Statement)
- Line Input
- MultiKey
- SetMouse
- Stick
- Strig
- WInput
Reproduced from the FreeBASIC Wiki Manual under the GNU Free Documentation License 1.3 — with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. Copyright © the FreeBASIC project and wiki contributors. See License.
tiko-lang · Home · Feature Index · Keyword Index · License
FreeBASIC manual pages reproduced under the GNU FDL 1.3.
- Generics
- Interfaces
- For Each
- Iterators
- Tuples
- Array Results
- Defer
- Lambdas
- Block Strings
- String Slices
- Embed
- Typed Variadics
- C Header Import
- Foreign Library Linking
- UString
- Fixed-Width Types
- Nullptr
- String Library
- Format
- Array
- Map
- Set
- LinkedList
- OrderedMap
- OrderedSet
- Sorting
- Optional
- Result
- Smart Pointers
- Date and Time (Chrono)
- Filesystem
- File Streams
- Config (INI and TOML)
- Codec
- Hash
- UUID
- OS
- Process
- Net
- HTTP and TLS
- Math Library
- Finance
- Logging
- Terminal TUI Library
- PsControls
- tkControls
- sys/win
- Goroutines and Channels
- LLVM Backend
- tiko build
- TIKO_COMPILER
- Variable Declarations
- Standard Data Types
- User Defined Types
- Procedures
- Operators
- Control Flow Statements
- Converting Data Types
- Array Functions
- String Functions
- Mathematical Functions
- Bit Manipulation
- Date and Time Functions
- File I/O Functions
- Console Functions
- User Input (Runtime Library)
- User Input Functions (Graphics Library)
- Screen Functions
- 2D Drawing Functions
- Graphics Library Reference
- Graphics Keyword List
- Memory Functions
- Threading Support Functions
- Error Handling Functions
- Operating System Functions
- Preprocessor
- Intrinsic Defines
- Miscellaneous Keywords
- Modularizing