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FUNCTION FUNCTION EXPRESSED IN TERMS OF BASIC FUNCTIONS
INVERSE HYPERBOLIC
SINE ARGSINH(X) = LOG(X+SQR(X*X+1))
INVERSE HYPERBOLIC
COSINE ARGCOSH(X) = LOG(X+SQR(X*X-1))
INVERSE HYPERBOLIC
TANGENT ARGTANH(X) = LOG((1+X)/(1-X))/2
INVERSE HYPERBOLIC
SECANT ARGSECH(X) = LOG((XQR(-X*X+1)+1)/X
INVERSE HYPERBOLIC
COSECANT ARGCSCH(X) = LOG((SGN(X)*SQR(X*X+1)+1)/X)
INVERSE HYPERBOLIC
COTANGENT ARGCOTH(X) = LOG((X+1)/(X-1))/2
A ERROR MESSAGES
If an error occurs, BASIC outputs an error message, returns to command level and displays the
cursor. Variable values and the program text remain intact, but the program can not be continued
and all GOSUB and FOR context is lost.
When an error occurs in a direct statement, no line number is printed.
Format of error messages:
Direct Statement ?XX ERROR
Indirect Statement ?XX ERROR IN YYYYY
In both of the above examples, "XX" will be the error code. The "YYYYY" will be the line
number where the error occured for the indirect statement.
The following are the possible error codes and their meanings:
ERROR CODE MEANING
BS Bad Subscript. An attempt was made to reference a matrix element
which is outside the dimensions of the matrix. This error can occur
if the wrong number of dimensions are used in a matrix reference;
for instance, LET A(1,1,1)=Z when A has been dimensioned DIM
A(2,2).
CN Continue error, Attempt to continue a program when none exists, an
error occured, or after a new line was typed into the program.
DD Double Dimension. After a matrix was dimensioned, another DIM
statement for the same matrix was encountered. This error often
occurs if a matrix has been given the default dimension 10 because
a statement like A(I)=3 is encountered and then later in the program
a DIM A(100) is found,
FC Function Call error, The parameter passed to a math or string func-
tion was out of range. FC errors can occur due to:
1. A negative matrix subscript (LET A(-1)=0)
2. An unreasonably large matrix subscript (>32767)
3. LOG-negative or zero argument
4. SQR-negative argument
5. A^B with A negative and B not an integer
6. A call to USR before the address of the machine language