convert negative to positive

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1.00/5 (2 votes)

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Hello.

I have a problem that i hope you can help me with.

I going to get all the negative from this array int[] num = {-5,-4,-3,-2,-1,1,2,3,4,5,6};
and then change the negitive in to positive and then type it out on the screen the negetive that have changed to positive.

Posted 6-Mar-13 6:36am

Tommy116

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Richard C Bishop 6-Mar-13 12:41pm

So what is the problem?

3 solutions

Solution 4

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Cs_Scratch_Console
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] numbers = new int[] {-1,-2,0,1,2};
            for (int val = 0; val <= numbers.Length - 1; val++)
            {
                if (numbers[val] < 0)
                {
                    Console.WriteLine(numbers[val]);
                    numbers[val] = Math.Abs(numbers[val]);
                }
            }
        }
    }
}

Posted 6-Mar-13 8:10am

M-Badger

Updated 6-Mar-13 10:07am

v2

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Thomas Daniels · Accepted Answer · 2013-03-06T06:41:00

Solution 1

Hi,

To get all negative integers from the array, try this:

C#

int[] neg = num.Where(x => x < 0).ToArray();

To change the negative numbers in neg into positive numbers, try this:

C#

int[] negToPos = neg.Select(x => Math.Abs(x)).ToArray();

And if you just want to change all negative numbers in num into positive numbers, try this:

C#

int[] pos = num.Select(x => Math.Abs(x)).ToArray();

Hope this helps.

Posted 6-Mar-13 6:41am

Thomas Daniels

Comments

Mike Meinz 6-Mar-13 13:02pm

My 5.
Nice!

Thomas Daniels 6-Mar-13 13:04pm

Thank you!

ridoy 6-Mar-13 15:16pm

+5

Thomas Daniels 7-Mar-13 12:05pm

Thank you!

Mike Meinz · Accepted Answer · 2013-03-06T06:42:00

Solution 2

When you get a negative value, reverse the sign like this:

result = -ValueFromArray;

Posted 6-Mar-13 6:42am

Mike Meinz

Comments

CHill60 6-Mar-13 12:46pm

Nice and simple (and clear). My 5

Thomas Daniels 6-Mar-13 13:05pm

Good answer, +5!

ridoy 6-Mar-13 15:16pm

+5