So I was tasked to produced a series of numbers based on what I input on START, STEP, and END. For example: If I input 5 on the START, 2 on the STEP, and 13 on the end, then the output would be:

5, 7, 9, 11, 13

import java.util.Scanner;
public class SeriesOfNumbers {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int [] numbers = {1 ,2 ,3 ,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20};
        int start = 0;
        int step = 0;
        int end = 0;
        boolean foundNum = false;
        
        
        System.out.print("START: ");
        start = scan.nextInt();
        for(start = 0; start <= numbers.length; start  ) {
            if(start == numbers.length) {
                foundNum = true;
                break;
            }
        }
                
        System.out.print("STEP: ");
        step = scan.nextInt();
        for(step = 0; step <= numbers.length; step  ) {
            if(start == numbers.length) {
                foundNum = true;
                break;
            }
        }
        System.out.print("END:");
        end = scan.nextInt();
        for(end = 0; end <= numbers.length; end  ) {
            if(end == numbers.length) {
                foundNum = true;
                break;
            }
        }
        if(foundNum) {
            System.out.print("The output will be: ");
        }
        }
    }

Expected output:

START: 5

STEP: 3

END: 20

The output will be: 5 8 11 14 17 20

Since I'm new to JAVA and it's my first programming language, I have no idea what I am doing. A little assistance might help. Thank you!

CodePudding user response：

You don't need multiple loops here. Your start, step and end variables are sufficient to produce your output in one loop.

for (int i = start; i <= end; i  = step) {
  System.out.print(i   " "); // just an example - you could add the number to a list instead
}

CodePudding user response：

Here's a simple program according to your description.

Notes:

1. The variable int[] numbers and boolean foundNum was never used

2. You only needed a single for loop for your said program.

3. Closing your object Scanner is a good practice.

import java.util.Scanner;

public class SeriesOfNumbers {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        System.out.print("START: ");
        int start = scan.nextInt();
        
        System.out.print("STEP: ");
        int step = scan.nextInt();
        
        System.out.print("END: ");
        int end = scan.nextInt();

        System.out.print("The output will be: ");
        for (int i = start; i <= end; i  = step) {
            System.out.print(i   " ");
        }

        scan.close();
    }
    
}