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The next group of functions are the comparisons.
int String::operator==(const String&) const;
The comparison operators (==,
!=, <,
<=, >=, and
>) are all implemented for Strings.
s == t  is true if Strings s
and t represent identical  sequences of characters.
As usual, != is the negation of
==.  The other comparison operators implement lexicographic
ordering using native character  comparison.  If String s
is a proper initial substring of String
t, then s < t
is  true.