These statements are similar to their BASIC Plus counterparts. The following functions and expressions are supported by IF, with the same syntax as for BASIC:
|
ABS |
ACS |
ASC |
ASN |
ATN |
CHR |
|
COS |
DATN |
DEVICE |
EXP |
FACT |
FIX |
|
FIX |
INSTR |
INT |
LCS |
LEFT |
LEN |
|
LEN |
LOG |
LOG10 |
LOOKUP |
MID |
RIGHT |
|
RND |
SGN |
SIN |
SPACE |
SQR |
STR |
|
TAN |
TIME |
UCS |
VAL |
|
|
The most useful of the above functions, LOOKUP, works slightly differently than the BASIC Plus equivalent. Instead of returning the file size, it always returns –1 if the file exists, else 0. See the example in the MAIN.DO file above.
The following operators are supported:
|
Relational Operators |
|
Mathematical Operators | ||
|
Symbol |
Meaning |
|
Symbol |
Meaning |
|
= |
Equal |
|
+ |
Addition |
|
<> |
Not equal |
|
- |
Subtraction |
|
# |
Not equal |
|
* |
Multiplication |
|
> |
Greater than |
|
/ |
Division |
|
>= |
Greater than or equal |
|
^ |
Raise to power |
|
< |
Less than |
|
** |
Raise to power |
|
<= |
Less than or equal |
|
|
|