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(xi). indexOf();
FORMAT: a1.indexOf(‘d’);
USAGE:
This returns the position of the first occurrence of ‘d’ in the string a1.
(xii). indexOf(); [another format]
FORMAT: a1.indexOf(‘d’,n);
USAGE:
This format gives the position of ‘d’ starting from the nth position in the
string variable a1.
(xiii). compareTo()
FORMAT: a1.compareTo(a2);
USAGE:
This function returns negative if a1 is less than a2, positive if a1 is greater than a2 and zero if a1 is equal to a2.