Question

Using for loops:

- write a Java program that adds numbers between 1 to 100 and prints the result.

- write a Java program that adds odd numbers between 1 to 100 and prints the result

- write a Java program that averages even numbers between 5 to 30 and prints the result

Answer 1

//TestCode.java
public class TestCode {
    public static void main(String[] args) {
        int sum = 0;
        for(int i = 1;i<=100;i++){
            sum += i;
        }
        System.out.println(sum);
    }
}

////////////////////////////////////////////////////////////////////

//TestCode.java
public class TestCode {
    public static void main(String[] args) {
        int sum = 0;
        for(int i = 1;i<=100;i+=2){
            sum += i;
        }
        System.out.println(sum);
    }
}

////////////////////////////////////////////////////////////////////

//TestCode.java
public class TestCode {
    public static void main(String[] args) {
        int sum = 0, count = 0;
        for(int i = 6;i<=30;i+=2){
            sum += i;
            count += 1;
        }
        System.out.println((1.0*sum)/count);
    }
}