Write a Program to Toggle Each Character in a String 

C++// C++ Program to toggle string #include <cstring> #include <iostream> using namespace std; int main() { string str = "GeeksforGeeks"; for (int i = 0; str[i] != '\0'; i++) { if (islower(str[i])) { str[i] = toupper(str[i]); } else if (isupper(str[i])) { str[i] = tolower(str[i]); } } cout << "Toggled string: " << str << endl; return 0; }

Output

Toggled string: gEEKSFORgEEKS