Function: errcatch (<expr_1>, ..., <expr_n>) Evaluates <expr_1>, ..., <expr_n> one by one and returns
[<expr_n>] (a list) if no error occurs. If an error occurs in the evaluation of any argument,
errcatch prevents the error from propagating and returns the empty list
 without evaluating any more arguments.
errcatch is useful in
batch files where one suspects an error might occur which would terminate the
batch if the error werent caught.
(%o1) true (%i2)