Inner loop in the method

#1

//why inner goes upto s1<=length()…it should go upto s1<length() only right ?
for(String s1:rr)
{
for(int j=0;j<=s1.length();j++)
{
String s2=s1.substring(0,j)+ch+s1.substring(j);
mr.add(s2);
}
}

#2

No. its correct, it should be j<=s1.length() . this equals sign is important when you append the character in the last.
for eg. at certain point ch=‘a’ and s1=“bc”… then to get a permutation “bca”, j must be equal to s1.length().

Thanks

#3

please resolve it and rate it if satisfied.
Thanks
.

#4

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