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MELSEC-Q
2 THE BASICS OF AD51H-BASIC
The special characters have the following meanings in BASIC statements.
Special Symbol Name Meaning
Space Used to separate instructions and parameters.
! Exclamation Indicates single-precision type.
“ Double quotation mark Symbols for enclosing a character string.
# Number sign File number symbol, indicates double-precision type.
$ Dollar sign Indicates character type.
% Percent sign Indicates integer type.
& Ampersand Specifies character format.
‘ Apostrophe Comment delimiter
( Left parenthesis
) Right parenthesis
* Asterisk Multiplication symbol
+ Plus sign Positive symbol, addition symbol, character string addition
symbol
, Comma Delimiter
Example
INPUT A, B
PRINT X, Y, Z
DATA 10, 13, 91, 4
- Negative sign, minus,
hyphen
Negative sign, subtraction symbol.
Used to specify a range of lines in instructions such as LIST
and DELETE.
Example
LIST 100-300
DELETE 1000-3000
DEFDBL A-H
. Period Used as a decimal point as well as internally by BASIC as a
line number control pointer. Line number values that change
constantly are stored in this way, for example, line numbers
in which errors were generated during program execution,
line numbers at which the program was halted by STOP or
END instructions, or line numbers when a new line number
is inserted.
Example
LIST.
AUTO.
/ Slash Division symbol.
: Colon Multi-statement delimiter
; Semicolon Delimiter
Example
PRINT “@@@=” ; A
A PRINT X ; Y ; Z
INPUT “A=” ; A
< Less-than sign
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