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Commands
Vendor
Model
HP
TI
HP-75
HP-71B with HP-IL
N/A
'LABEL', LABEL
ON ... GOTO/GOSUB
Available
IF ... THEN ...
THEN is mandatory.
Nested IF
CC-40
N/A
IF ... THEN ... ELSE ...
Program flow
TI-74
Alphanumeric(8) with ' ':
Same syntax as file names.
Labels
Syntax for branch targets besides
line numbers
Commands
Available.
N/A
Only after ELSE.
Allowed, nearest ELSE belongs to nested IF.
Multiline IF ... ENDIF
WHILE ... WEND
N/A
REPEAT ... UNTIL
SWITCH ... CASE ... ENDSWITCH
Subroutines
FOR I=1 TO 2 STEP -1
NEXT I
Loop not executed, I=1 after loop.
Variable name on NEXT
Mandatory
Function and position of END
Executable command anywhere in program. Closes all local files and deallocates
local variables. Substitutes END SUB in subroutine. Returns from CALLed external Executable command anywhere in program. Closes all open files. Allowed even
program.
after SUBEND. Executable from keyboard.
HP-75 : not executable from keyboard.
Local procedure definition
besides GOSUB/RETURN
Use DEF FN or external file.
SUB name(params)
Name follows label syntax.
SUB name(params)
Name follows variable syntax.
Return from procedure
END, END FN
END SUB, END or next SUB.
SUBEND. SUBEXIT returns early.
Variable scope
Parameters of FNX() and
variables in external program are local.
Variables are local. Files are local, if no
parameter list is defined.
Call and parameter passing
X=FNY(...)
CALL 'file'
CALL name(R,A,(V),#C )
CALL file
Recursion
Fully implemented.
ON ERROR command
ON ERROR GOTO/GOSUB
Error line and error code
ERRL, ERRN
ERRL, ERRN, ERRM$
Error handling
Disable error handler
N/A
Debugging
BASIC comparison sheet
OFF ERROR
ON ERROR STOP
DEFAULT ON/OFF/EXTEND, TRAP handle
math exceptions.
PAUSE (STOP acts like END)
CONT target
N/A
CALL ERR(CODE,TYPE,FILE,LINE)
RETURN, RETURN NEXT, RETURN line number
TRACE FLOW/VARS/OFF turn tracing on/off.
Suspend execution
Continue after STOP,
break key or break point
ON ERROR line number
RETURN if command is GOSUB.
ON TIMER #n,seconds,commands
OFF TIMER #n
More event handling
CALL name(Reference,Array(),Matrix(,),(Value))
N/A
ON ERROR
Return from error handler
All variables are local.
ATTACH/RELEASE name,... handle
preallocation and allow variable
persistence.
All variables are local.
CONT or SST key
Commands
ON WARNING PRINT/NEXT/ERROR
ON BREAK STOP/NEXT/ERROR
BREAK/UNBREAK line,line,...
set or clear breakpoints.
BREAK (STOP acts like END)
CON/CONTINUE line number
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