gfg_string_question

Importance

Transform:-

transform(s.begin(), s.end(), s.begin(), ::tolower);
transform(s.begin(), s.end(), s.begin(), ::toupper);
Find:- s1.find(s2[i])!=string::npos:- it means <find s2[i] in s1> is present
token:- stringstream ex:
string s = "geeks for geeks"; stringstream ss(s); // Used for breaking words
string word; // to store individual words
while (ss >> word)
cout << word << endl;
next_permutation()