Can anyone tell me why my console doesn’t show up as a result of anything?

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Receive a value n and print the following table using the structure chaining for:

1
2   4
3   9  27
4  16  64  256
n  n²  n³  ...  n^n

I tried to:

import java.util.Scanner;

public class Questao4 {

    public void Cadeia() {
        Scanner num = new Scanner(System.in);
        System.out.printf("Informe um número: ");
        int n = num.nextInt();

        for (int i = 1; i < n; i++) {
            for (int j = 1; j < n; j++) {

                System.out.println(Math.pow(i,j) + "");
            }
            System.out.println("");
        }

    }

}
java chain-list
  • 1

    I posted a variable response based on your original question. Nothing prevents you from deleting the r and leave the Math.pow inside the print

  • Thank you so much for helping me! :)

  • 1

    @Emersonaraujo is welcome, I’m glad that the answer helped you with your question / problem, take advantage and make the [tour] to know how it works to community.

  • 1

    Good that it was useful, the important thing is that with Edit, you clarified things you wouldn’t give with the original post. When you can, read [help] and [Ask], and always try to elaborate the question with the relevant details, so you can have a quick answer

1 answer

3


I’ve made some corrections and adjustments, and I’ve listed them for you to understand the effects of each change:

  • Changed condition i < n for i <= n so that the number of lines matches the typed;

  • Changed condition j < n for j <= i, to meet the statement;

  • created a variable r to store the result of pow, which is a double;

  • added the variable r in print based on version 1 of the question, with separate calculation;

  • change the println for print in the loop, to avoid skipping line between values;

  • removal of the "" within the println end, it’s unnecessary if you just want the line break.

class Questao4 {
    public void Cadeia() {
        Scanner num = new Scanner(System.in);
        System.out.printf("Informe um número: ");
        System.out.println();

        int n = num.nextInt();
        double r;

        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                r = Math.pow(i,j);
                System.out.print(r + "        ");
            }
            System.out.println();
        }
    }
}

See working on IDEONE

  • Thank you very much. It was very enlightening. Thank you msm Tava erring in doing both "for" in function of "n".

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