Blassic: keywords.

a b c d e f g h i j k l m n o p q r s t u v w x y z

Square brackets represent that the part surrounded is optional.

Several elements separated by | means that you may choose one of the elements.


ABS
Function. Returns the absolute value of the parameter.
PRINT ABS (-1)
ACOS
Function. Returns the arc cosine of the parameter.
ACOSH
Function. Returns the hyperbolic arc cosine of the parameter.
AFTER
See SYMBOL AFTER.
AND
Operator. Does a integer binary and between its arguments.
APPEND
See OPEN.
AS
See OPEN, SOCKET, FIELD and NAME.
ASC
Function. Returns the code of the first char of the argument, 0 if the string is empty. The name comes from the ASCII character set, but the code can be outside the ascii range (0-127).
ASIN
Function. Returns the arc sine value of the parameter.
ASINH
Function. Returns the hyperbolic arc sine of the parameter.
AT
PRINT modifier. PRINT ... AT y, x ... Place the cursor in the x column of the line y. Contrary to the other cursor movement instructions, the upper left of the screen is 0, 0.
ATAN
Function. Returns the arc tangent of the arguemnt.
ATAN2
Function. ATAN (y, x) returns the arc between the x axis and the line (0, 0) - (x,y).
ATANH
Function. Returns the hyperbolic arc tangent of the argument.
AUTO
AUTO [initial number] [, increment] Enter the auto numbering mode. The default values are 10 and 10 but can be modified via the system vars AutoInit and AutoInc or with the -a command line option.
BEEP
Makes a beep.
BIN$
Function. BIN$ (number [,c] ) Returns a string of binary digits with the value of number, if the c argument is present and the length of the result is shorter than c is filled with zeroes.
BINARY
Mode specification for OPEN
BREAK
See ON BREAK.
BRIGTH
Not documented yet.
CHAIN
CHAIN filaname$ [ , line ] Loads a program in memory and begin execution from the beginning or from line. Variables are not cleared.
CHAIN MERGE filename$ [ , line ] [ , DELETE range ] Merge a program with the present in memory and begins executing the resulting program from the beginning or from line. If the DELETE part is present the range of lines is deleted before the merge, range can be a single line or in the form initial-final where initial and final are line numbers and can be omitted.
CHDIR
Changes current directory.
CHR$
Function. Returns a string of lenght 1 with the char that has the argument as code.
CINT
Function. Returns the argument rounded to integer.
CIRCLE
CIRCLE (x, y), r, [ color ], [ initial ], [ final ] [ , e ] Draws a circumference centered in (x, y) with radius r, setting the graphics pen to color beginning in angle 0 or in initial and ending in 2 * PI radians or in final. If e is present an ellipse is drawed instead, if e is greater than 1 the x axis is divided by e, else the y axis is multiplied by it.
CLEAR
CLEAR Clear all variables and arrays, close all opened files, erase user defined functions, set trigonometric mode to radians, forget pending loops.
CLEAR INK Restore all inks to its default values.
CLEAR INPUT Discards all key and mouse button events actually buffered.
CLOSE
Not documented yet.
CLS
In text mode: CLS Clear the screen.
In graphics mode CLS [ #window ] Clear the text window specified (0 by default).
See also GRAPHICS CLS.
COLOR
Not documented yet.
CONT
Continue execution previously stopped by a STOP instruction or a break.
COPYCHR$
Function. COPYCHR$ (#w) return the character present at the current cursor position in window w, or the empty string if the character can't be recognized.
COS
Function. Returns the cosine value or the argument.
COSH
Function. Returns the hyperbolic cosine value of the argument.
CVD
Not documented yet.
CVDMBF
Not documented yet.
CVI
Not documented yet.
CVL
Not documented yet.
CVS
Not documented yet.
CVSMBF
Not documented yet.
DATA
Not documented yet.
DATE$
Function without arguments. Returns a string with the current date in the format mm-dd-yyyy.
DEC$
Function DEC$ ( number, format) Returns a string representing the number using the specified format, that is a format specifier like the used in PRINT USING limited to numeric formats that represent a single number.
DEF
DEF DBL | INT | REAL | SNG | STR letter-specifier. Define that the variables beginning by a letter specified in the letter-specifier are of type: DBL, REAL, SNG ---> floating point, INT ---> integer, STR ---> string. The various types of floating point are admitted for compatibility with other Basics.
The letter-specifier is a comma separated list of single letter of ranges of letters.

DEF FN Not documented yet.
DEFDBL
Same as DEF REAL
DEFINT
Same as DEF INT
DEFREAL
Same as DEF REAL
DEFSNG
Same as DEF REAL
DEFSTR
Same as DEF STR
DELETE
Not documented yet.
DEG
Set the trigonometric mode to degrees.
DELIMITER
Not documented yet.
DIM
Not documented yet.
DRAW
Not documented yet.
DRAWARC
Not documented yet.
DRAWR
Not documented yet.
EDIT
Not documented yet.
ELSE
Not documented yet.
END
Not documented yet.
ENVIRON
Not documented yet.
ENVIRON$
Not documented yet.
EOF
Not documented yet.
ERASE
Not documented yet.
ERL
Function without parameters. Returns the program line where the last error was generated, used normally inside an ON ERROR GOTO routine.
ERR
Function without parameters. Returns the code of the last error generated, used normally inside an ON ERROR GOTO routine.
ERROR
ERROR n Forces the error number n, stopping the program or jumping to the position established by an ON ERROR GOTO instruction. For a list of the error numbers used by blassic refer to the error.h file in the sources.
EXIT
EXIT [n] Quit blassic returning to the operating system. The n value, 0 if not specified, is used as the return value of the blassic command (the ERRORLEVEL value in Windows).
EXP
Function. Returns the exponential of the argument, that is, e (the base of natural logarithms) raised to that power.
FIELD
Not documented yet.
FIELD APPEND
Not documented yet.
FIELD CLEAR
Not documented yet.
FILES
FILES List files in current directory.
FILES [ #channel , ] "mask" List files in current directory that matches mask. The wildcards allowed are operating system dependant. The listing is directed to the channel specified, 0 by default, that can be a window or a file.
FIND_FIRST_NOT_OF
Function. As FIND_FIRST_OF but with characters that are not in char$.
FIND_FIRST_OF
Funtion. FIND_FIRST_OF (searched$, char$) Returns the first position of searched that contains a character of char$, or 0 if none is found.
FIND_LAST_NOT_OF
Function. As FIND_LAST_OF, but with characters thar are not in char$.
FIND_LAST_OF
Fuction. As FIND_FIRST_OF but returns the last position.
FINDFIRST$
Function. FINDFIRST$ (mask$) Returns the first file that matches wiht mask$ or the empty string if there is no match . The wildcards allowed and his interpertation are operating system dependant.
FINDNEXT$
Function whitout parameters. Returns the next file that matches with the mask$ used in the las FINDFISRT$ executed, or the empty string if there is no more matches.
FIX
Not documented yet.
FN
Not documented yet.
FOR
Not documented yet.
FREEFILE
Function. Returns the lower free channel number.
GET
Not documented yet.
GOSUB
GOSUB line_specification Calls the subroutine located at line_specification, that can be a line number or a valid LABEL. The control will return to the actual point when a RETURN is executed. See also ON GOSUB.
GOTO
GOTO line_specification Transfer the control to the position line_specification, tnat can be a line number or a valid LABEL. See also ON GOTO.
GRAPHICS
Not documented yet.
HEX$
Function. HEX$ (number [ , width] ) Returns the hexadecimal representation of number as string. If width is specified and is too great the result will be filed with leading zeros, if is too small the result is NOT shortened.
IF
Not documented yet.
IF_DEBUG
IF_DEBUG n If debug level is greater or equal than n the rest of the line is executed, otherwise is ignored.
See the --debug command line option and the DebugLevel system var.
INK
INK n Same as PEN n
INK n, color [, second] Define the ink number n as the color, from the tabla of Amstrad CPC compatible colors. The optional second parameter is accepted for compatibility with the CPC but is ignored.
INK n, r, g, b Define the ink number n as the color from the rgb componentes, r, g and b between 0 and 255.
PRINT modifier: INK n Same as standalone instruction, but the efects remains only until the actual PRINT ends.
INKEY
Not documented yet.
INKEY$
Not documented yet.
INPUT
Not documented yet.
INPUT$
Not documented yet.
INSTR
Function. INSTR ( [start_pos , ] searched_string$, string_to_find$) Returns the position of the first occurrence of sting_to_find$ in searched_string$, or 0 if not present.The position at wich to start can be specified as start_pos.
INT
Not documented yet.
INVERSE
Not documented yet.
KILL
Delete a file.
LABEL
LABEL identifier Define a label in the program, then instructions that normally uses a line number as parameter, such as GOTO, can use the indetifier instead. LABEL must be the first instruction in a line, otherwise is ignored.
LEFT$
Function. LEFT$ (string$, n) Returns the first n charaters from string$, or string$ if n is greater than LEN(string$).
LEN
Function. LEN (string$) return the length of the string.
Note for C programmers: The total length of the string is returned, including possible NUL characters contained.
LET
Not documented yet.
LINE
Not documented yet.
LIST
Not documented yet.
LLIST
Same as LIST but the default channel is directed to the printer output.
LOAD
LOAD "program" Load a blassic program. If program is not found program.blc and program.bas are tried.
LOAD "filename", var$ Load a file into a string var.
LOAD "filename", address [, size] Load a file in the address of memory specified. If size is given loads only that size, otherwise the entire file.
LOCAL
Not documented yet.
LOCATE
LOCATE [ #channel , ] a, b Move the cursor to the position specified with the coordinates a, b. The screen origin is 1, 1. Channel must be a graphics window in graphics mode or the console output in text mode, if omitted channel 0 is used. The order of the coordinates is dependant of the system variable Flags1, by default Microsoft style (row, col) is used.
LOF
Function. Returns the length of the file associated with the channel number specified.
LOG
Function. Returns the natural logarithm of the argument.
LOG10
Function. Returns the decimal logarithm of the argument.
LOWER$
Function. Returns the string argument converted to lower case.
LPRINT
Same as PRINT but the default channel is directed to the printer output.
LSET
Not documented yet.
LTRIM$
Function. Left trim. Returns the string argument without possible initial speces.
MASK
Not documented yet.
MAX
Function. MAX (list of numeric expresssions) Returns the maximum of the list.
MID$
Function: MID$ (string$, pos [ , length ] ) Returns the substring of string$ that begins at pos and has length characters or to the end of string$ if length is not specified or is too long.
Instruction: MID$ (string$, pos [, length] )= stringexpr$ Replaces the substring of string$ specified as in MID$ function with stringexpr$.
MIN
Function. MIN (list of numeric expressions) Returns the minimum value of the list.
MKD$
Not documented yet.
MKDIR
Create a directory.
MKDMBF$
Not documented yet.
MKI$
Not documented yet.
MKL$
Not documented yet.
MKS$
Not documented yet.
MKSMBF$
Not documented yet.
MOD
Operator. a MOD b returns the remainder of a / b.
MODE
Not documented yet.
MOVE
Not documented yet.
MOVER
Not documented yet.
NAME
NAME file1$ AS file2$ Renames the file named file1$ as file2$.
NEW
Not documented yet.
NEXT
Not documented yet.
NOT
Operator. Return the binary not of the argument taken as integer.
OCT$
Function. OCT$ (number [ , width ] ) Returns the octal representation of number as string. If width is specified and is too great the result will be filled with leading zeros, if is too samll the result is NOT shortened.
ON
See ON BREAK, ON ERROR GOTO, ON ... GOTO and ON ... GOSUB.
ON BREAK
ON BREAK CONT Cancel the effect of ctrl-c of stopping the program.
ON BREAK GOSUB n When ctrl-c is pressed the program whill jump to the subroutine specified. n can be a line number or a label.
ON BREAK STOP Disables the effect of ON BREAK CONT and ON BREAK GOSUB, ctrl-c will interrupt the program.
ON ERROR GOTO
ON ERROR GOTO n Jumps to the specified line when an error is detected in the program. n can be a line number or a label. See RESUME, ERR, ERL.
ON ... GOTO
Not documented yet.
ON ... GOSUB
Not documented yet.
OPEN
Not documented yet.
OR
Operator. Does a integer binary or between its arguments.
ORIGIN
Not documented yet.
OSFAMILY$
Function without parameters. Returns the type of the operating system under which Blassic is used. Actually only two familys are defined, "windows" and "unix". The value will be unix under Windows if the version od Blassic was compiled with Cygwin.
OSNAME$
Function without parameters. Returns the name of the operating system under wich Blassic is used. The value will be "Windows" under Windows (except if compiled under Cygwin) and the value returned from a uname system call otherwise.
OUTPUT
Not documented yet.
PAINT
Not documented yet.
PAPER
Not documented yet.
PAUSE
Not documented yet.
PEEK
Not documented yet.
PEEK16
Not documented yet.
PEEK32
Not documented yet.
PEN
Not documented yet.
PI
Function without parameters. Returns the value of the pi number.
PLEASE
Undocumented instruction, please do not use.
PLOT
Not documented yet.
PLOTR
Not documented yet.
POKE
Not documented yet.
POKE16
Not documented yet.
POKE32
Not documented yet.
POP
Discard the last value of the GOSUB/RETURN stack. Variables defined as LOCAL are restored to his previous values.
POPEN
Not documented yet.
POS
Function. POS (#channel) return the horizontal position of the cursos in that channel. Only screen channels are allowed.
PRINT
Not documented yet.
PROGRAMARG$
Function: PROGRAMARG$ (n) returns the n command line parameter with blassic is calles, excluded the blassic command and the program name, or the empty string if there is no sufficient parameters.
Instruction: PROGRAMARG$ arg1$ [, args$ ....] Establishes the return values of the PROGRAMARG$ function to the args specified. Useful when debugging.
PROGRAMPTR
Funtion without parameters. Returns the address of the program memory area, or 0 if there is no program. See the autoview.bas and automod.bas sample programs.
PULL
Drops the las element of the REPEAT / UNTIL stack.
PULL FOR
Drops the las element of the FOR / NEXT stack.
PULL GOSUB
Same as POP.
PULL REPEAT
Same as PULL.
PULL WHILE
Drops the las element of the WHILE / WEND stack.
PUT
Not documented yet.
RAD
Set trigonometric mode to radians.
RANDOM
Not documented yet.
RANDOMIZE
Not documented yet.
READ
Not documented yet.
REAL
See DEF REAL.
REM
Remark. The rest of the line is ignored.
RENUM
Not documented yet.
REPEAT
Not documented yet.
RESTORE
Not documented yet.
RESUME
RESUME [NEXT | n] On an ON ERROR GOTO routine, returns to the statement that produced the error, to the next statement, or to the postion specified by n, that can be a number line or a label.
RETURN
Continues execition after the point of the last GOSUB. Variables defined with LOCAL are restored to his previous values.
RIGHT$
Function. RIGHT$ (string$, n) Returns the last n charaters from string$, or string$ if n is greater than LEN(string$).
RINSTR
Function. Like INSTR but from end ot string to beginning.
RMDIR
Not documented yet.
RND
Not documented yet.
ROUND
Not documented yet.
RSET
Not documented yet.
RTRIM$
Function. Right trim. Returns the strig argument without possible final spaces.
RUN
Not documented yet.
SAVE
SAVE "program" Saves the program in Blassic binary format. The recommended extension is .blc, but is not added automatically.
SAVE "program", A Saves the program in text format. The recommended extension is .bas but is not added automatically.
SAVE "filename", B, var$ Save the content of the string var$ into filename.
SAVE "filename", B, address, length Save length bytes of memory beginning at address.
SCREEN$
Not documented yet.
SET_TITLE
Set the title of the window. In graphics mode, the title of the graphics window is affected. In text mode, in windows the console window is affected, in unix if the terminal type is xterm, aixterm, dtterm, iris-ansi, sun-cmd or hpterm the title of the terminal window is affected, otherwise the instruction has no effect.
SGN
Function. Returns -1, 0 or 1 if the argument is negative, 0 or positive, respectively.
SHELL
SHELL command$ Executes command$ as a shell command.
SIN
Function. Returns the sine value or the argument.
SINH
Function. Returns the hyperbolic sine value or the argument.
SOCKET
SOCKET "host", port AS #channel Open a socket and connect it to the host specified using the tcp port number, and associates it to the input/output channel.
SPC
PRINT modifier. Prints the number of spaces indicated by the arguemnt.
SPACE$
Funtion. Returns a string composed of the number of spaces indicated by the argument.
SQR
Function. Returns the square root of the argument.
STEP
Not documented yet.
STOP
Stops execution. See CONT.
STR
See DEF STR.
STR$
Not documented yet.
STRING$
Not documented yet.
SWAP
Not documented yet.
SYMBOL
SYMBOL n, b1, b2, b3, b4, b5, b6, b7, b8 Define the char number n with 8 bytes of data, each bit corresponding to one pixel. b1 to b8 can be omitted, 0 is applied in that case.
SYMBOL AFTER
SYMBOL AFTER n Set the number of permissible user defined characters. Characteres with values from n to 255 become definables. With 0 all chars are definables, with 256 none. All characters are reset to their default values.
SYNCHRONIZE
Not documented yet.
SYSTEM
SYSTEM Quits blassic returning to the operating system.
SYSVARPTR
Function whitout parameters. Returns the address of the system vars memory area. For information on the system vars refer to the sysvar.h file in the sources.
TAB
PRINT modifier. TAB n Prints spaces until the horizontal postition of printing reaches n. If n is greater than the current position, before doing this spaces are printed until reached the end of the line if the current channel is a grpahic window, then a line end is emitted..
TAG
Not documented yet.
TAGOFF
Not documented yet.
TAN
Not documented yet.
TANH
Not documented yet.
TEST
Function. TEST (x, y) moves the graphic cursor to x, y and returns the ink number corresponding to the color of that point.
TESTR
Function. Same as TEST but the cursor movement is relative to the current position.
THEN
Not documented yet.
TIME
Not documented yet.
TIME$
Not documented yet.
TO
Not documented yet.
TRIM$
Function. Returns the string argument without possible initial and final spaces.
TROFF
Set trace mode to off. See TRON.
TRON
Set trace mode to on and stablishes the type of trace.
TRON [ LINE ] [ #channel ]
When the trace mode is on, information is printed about the current line before executing it. Whithou LINE the information printed is [line-number] (The [ ] are literal in this case); with LINE specified the entire line is printed. The information is printed in the channel specified, 0 if omitted.
UNTIL
Not documented yet.
UPPER$
Function. Returns the string argument converted to upper case.
USING
Not documented yet.
USR
Not documented yet.
VAL
Function. Returns the value of the first characters of the string argument that are a valid number according to the syntax of Blassic (0 if nome), or the entire string evaluated as a Blassic numeric expression, depending of the value of the system variable TypeOfVal.
VAL$
Function. Returns the value of the string argument evaluated as a Blassic string expression.
VARPTR
Not documented yet.
VPOS
Function. VPOS (#chanel) return the vertical position of the cursor in channel. Only screen channels in graphics mode are allowed.
WEND
Not documented yet.
WIDTH
WIDTH LPRINT n [, m] Stablishes the width of the printer output, when the width is exceeded a line separator is emitted (see the PrinterLine system variable. A value of 0 means unlimitted width. The value m if specified set the left margin for the printer in chars.
WHILE
Not documented yet.
WINDOW
Not documented yet.
WINDOW SWAP
Not documented yet.
WRITE
Not documented yet.
XMOUSE
Function without paramaters. Returns the x coordinate of the mouse position (only in graphics mode).
XOR
Operator. Does a integer binary xor (exclusive or) between its arguments.
XPOS
Function without parameters. Returns the x coordinate of the graphics cursor.
YMOUSE
Function without parameters. Returns the y coordinate of the mouse position (only in graphics mode).
YPOS
Function without parameters. Returns the y coordinate of the graphics cursor.
ZONE
ZONE value Stablishes value as the width of the zones used by the , PRINT delimiter. A value of 0 means 8 in the graphics window and that a tab character is used instead of spaces in printer and in text mode.

 That's all folks!