Calculates the first natural number greater than an integer expression.
Returns a character whose ASCII value is one greater than the first character of a string expression.
% = Succ(n)
$ = Succ[$](a$)
Succ(n) returns the first natural number greater than the integer expression n.
Debug.Show
Trace Succ(4 * 10 + 1) // Prints 42
Trace Succ("Hello world") // Prints I
Succ(a$) corresponds to Chr$(Succ(Asc(a$))).
Without the optional $ character the function still returns a String data type and not a Variant.
{Created by Sjouke Hamstra; Last updated: 23/10/2014 by James Gaite}