Question

write a program to print all the combinations of alphabets of length n.Eg: input 2: a b c d e...z aa ab ac ad... zz
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Answer 1

Answer::-- import static java.lang.Math.*;

private static String getString(int n) {

char[] buf = new char[(int) floor(log(25 * (n + 1)) / log(26))];

for (int i = buf.length - 1; i >= 0; i--) {

n--;

buf[i] = (char) ('A' + n % 26);

n /= 26;

}

return new String(buf);

}

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