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7.11.5 Logic Functions

   

@FALSE -
The logical value 0.

@FILEEXISTS(S) -
1 if file S can be opened for   reading; otherwise 0.

@IF(X, T, F) -
The value of T if X evaluates   to on-zero, or F if X evaluates to zero.

@ISERROR(X) -
Returns 1 if X ``contains'' an error,   otherwise 0.

@ISNUMBER(X) -
1 if X is a numeric value; otherwise   0.

@ISSTRING(X) -
1 if X is a string value; otherwise   0.

@TRUE -
The logical value 1.


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Next: 7.11.6 Digital Logic Functions Up: 7.11 Quick-Reference Guide to Previous: 7.11.4 String Functions

NExS User's Guide, Version 1.4.5
Grey Trout Software
11 April 1999