Java Community | Help. Code. Learn.•2w ago

Why do I need the abs method

23 Replies

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dan1st•2w ago

if a is >10, abs() turns the result into a positive number similar with b abs(10-a) calculates how much a is away from 10 if it wasn't there, it would just prefer the highest number no matter what

blue•2w ago

I wrote that part of the code from the exercise but abs was given therefore my question but the number just stays the same if it is negative it will return that number and if it is positiv it will return a positive number does abs really change anything @dan1st | Daniel

dan1st•2w ago

if a number is negative, it returns the positive version e.g. abs(-5) is 5

blue•2w ago

but shouldn`t it be return a if that was true it is -a in the code though that confuses me

dan1st•2w ago

-(-5) is 5, right? -a changes the sign

blue•2w ago

aaahhh hhaha

dan1st•2w ago

so if it's a negative number, the sign is changed to be positive

blue•2w ago

thanks a bunch got totallly confused there!!

JavaBot•2w ago

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blue•2w ago

Coulf I ask you another question if you have time

JavaBot•2w ago

Don't ask to ask. Just ask!

blue•2w ago

haha got it thanks just one sec need to copy the code

rainy 1234•2w ago

package de.codegym.task.task04.task0413; /* Wochentag / import java.io.; import java.util.Scanner;

public class Solution {
    public static void main(String[] args) throws Exception {
        //schreib hier deinen Code

        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        int a = input.read();// read a number from keyboard
      
        //Scanner numberkind = new Scanner(System.in);
        //int a = numberkind.nextInt();


        if (a ==1 )
            System.out.println("Montag");
        else if (a == 2 )
        System.out.println("Dienstag");
        else if (a == 3 )
            System.out.println("Mittwoch");
        else if (a == 4 )
            System.out.println("Donnerstag");
        else if (a == 5 )
            System.out.println("Freitag");
        else if (a ==6  )
            System.out.println("Samstag");
        else if (a == 7 )
            System.out.println("Sonntag");

        else if ( a > 7 || a < 1) //condition always true
            // since if reached only option bigger or less
            // then given intervall
            //=> just else also enough
            System.out.println("Diesen Wochentag gibt es nicht");

    }
}

public class Solution {
    public static void main(String[] args) throws Exception {
        //schreib hier deinen Code

        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        int a = input.read();// read a number from keyboard
      
        //Scanner numberkind = new Scanner(System.in);
        //int a = numberkind.nextInt();


        if (a ==1 )
            System.out.println("Montag");
        else if (a == 2 )
        System.out.println("Dienstag");
        else if (a == 3 )
            System.out.println("Mittwoch");
        else if (a == 4 )
            System.out.println("Donnerstag");
        else if (a == 5 )
            System.out.println("Freitag");
        else if (a ==6  )
            System.out.println("Samstag");
        else if (a == 7 )
            System.out.println("Sonntag");

        else if ( a > 7 || a < 1) //condition always true
            // since if reached only option bigger or less
            // then given intervall
            //=> just else also enough
            System.out.println("Diesen Wochentag gibt es nicht");

    }
}

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blue•2w ago

I used the Scanner and always got the result I was trying to achieve but with BufferReader I only get the output "Diesen Wochentag gibt es nicht" even if I enter 5 Can´t quite find my fault here

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Why do I need the abs method