Java / Basics / Strings - https://www.minte9.com/java/basics-strings-1219

strings.java

/**
 * Define a string s1 = "1"
 * Define a number n1 = 2
 * Display the sum of s1 + n1 = 3
 * (convert the string to number)
 */
class App {

    public static void main(String[] args) {
        
        /**
         * SOLUTION
         */
        String s1 = "1";
        int n1 = 2;
        System.out.println(n1 + Integer.valueOf(s1)); // 3
    }
}