An angle in radians, specified as a nonzero number. It can be specified as a value, a variable, or an expression. Specifying 0 generates an <ILLEGAL VALUE> error; specifying $DOUBLE(0) generates a <DIVIDE> error. A non-numeric string is evaluated as 0.
The following example permits you to compute the cosecant of a number:
READ"Input a number: ",numIFnum=0{WRITE!,"ILLEGAL VALUE: zero not permitted"}ELSE{WRITE!,"the cosecant is: ",$ZCSC(num)}QUIT
The following example compares the results from InterSystems IRIS fractional numbers ($DECIMAL numbers) and $DOUBLE numbers. In both cases, the cosecant of pi/2 is exactly 1:
WRITE!,"the cosecant is: ",$ZCSC($ZPI)WRITE!,"the cosecant is: ",$ZCSC($DOUBLE($ZPI))WRITE!,"the cosecant is: ",$ZCSC($ZPI/2)WRITE!,"the cosecant is: ",$ZCSC($DOUBLE($ZPI)/2)WRITE!,"the cosecant is: ",$ZCSC($DOUBLE($ZPI/2))