The “+” operator is designed in major programming languages ( including C++ and Java) such that when it is used with strings, it automatically concatenates them.

Code

#include <bits/stdc++.h>
using namespace std;

int main() {
  // Declare a string variable 'str1' and initialize it with "Hello"
  string str1 = "Hello";

  // Declare another string variable 'str2' and initialize it with "World"
  string str2 = "World";

  // Concatenate str2 to str1 using the '+' operator
  str1 = str1 + str2;

  // Print the final value of str1 which is "HelloWorld"
  cout << str1;

  return 0;
}
// Import the Scanner class and other necessary utilities
public class Main {
    public static void main(String[] args) {
        // Declare a string variable 'str1' and initialize it with "Hello"
        String str1 = "Hello";

        // Declare another string variable 'str2' and initialize it with "World"
        String str2 = "World";

        // Concatenate str2 to str1 using the '+' operator
        str1 = str1 + str2;

        // Print the final value of str1 which is "HelloWorld"
   