Question

The Java program should sum the odd integers from 1 to the integer that the user enters. For example, if the user enters 30, the program should sum the odd integers from 1 to 30.  

Print "Please enter a positive nonzero integer."

Declare a Scanner and obtain an integer from the user.  

Use a Do...while statement and calculate the sum

• Use the integer that the obtained from the previous step for the loop-continuation condition.

Display the sum

Print the sum following by this message: "Total: "

Answer 1

import java.util.Scanner;

public class MyClass {
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Please enter a positive nonzero integer: ");
        int n = sc.nextInt();
        int now = 1, total = 0;
        
        do{
            total += now;
            now += 2;
        }while(now < n);
        
        System.out.println("Total: " + total);
        
    }
}

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