WILLTEK 4403 - Erl; Erf; Mathematical Functions

Chapter 6 RAPID!
Functions
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199
ERL
ERF$
Mathematical functions The RAPID! environment of the 4400 provides most of the important mathemat-
ical functions:
Example
In this example, the 4400 prints an error message, giving
the error code, the line in which the error occurred and
the name of the related RAPID! program file.
ON ERROR GOTO errorHandler
...
errorHandler
PRINT "Error "; ERR; " in line ";
ERL;" in file ";ERF$
RESUME NEXT
Syntax
ERL
Parameters
There are no parameters.
Description
Returns the number of the program line, in which the last
error occurred.
Example
Please see example with
ERR function above.
Syntax
ERF$
Parameters
There are no parameters.
Description
Returns the name of the RAPID! program file, in which
the last error occurred.
Examples
Please see example with
ERR function above.
Function Short description
ABS Returns the absolute value of a numeric expression.
LOG, LGT Calculates the natural logarithm and the common loga-
rithm, repectively.
RND,
RANDOM-
IZE
Functions for generating random numbers.
SIN,
COS,
TAN,
ATAN
The most important trigonometric functions.
SQRT Calculates the square root of a numeric expression.