Get MAX and MIN Values in ArrayList

Eline Sami

I have an ArrayList that contains some double values and I need to get the MAX and MIN values.

Also, I need to sort this ArrayList. How can I do that?

myCode is below. It doesn't give the right Max value for example when I have like three numbers in my arraylist and all are negative. The max value is being returned is Zero.

ArrayList Values = new ArrayList();
double Max = 0; double Min =0; double temp = 0;

foreach (double x in Values)
{
temp = x;
if(Max{
Max = temp;
}
if(Min > temp)
{
Min = temp;
}
}

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes12y ago
Try this:

using System;
using System.Collections;

class Program
{
static void Main()
{
ArrayList Values = new ArrayList();
Values.Add(1.0);
Values.Add(3.2);
Values.Add(-1.1);
Values.Add(-4.5);

double Max = double.MinValue;
double Min = double.MaxValue;

foreach (double x in Values)
{
if(Max < x)
{
Max = x;
}
if(Min > x)
{
Min = x;
}
}

Console.WriteLine("Minimum value is " + Min);
Console.WriteLine("Maximum value is " + Max);

Values.Sort();

Console.WriteLine("\nThe elements in sorted order are\n");
foreach (double x in Values) Console.WriteLine(x);

Console.ReadKey();
}
}

The output is:

Minimum value is -4.5
Maximum value is 3.2

The elements in sorted order are

-4.5
-1.1
1
3.2

0

Guest User12y ago

It's fairly simple

public static object GetMinValue(ArrayList arrList)
{
      ArrayList sortArrayList = arrList;
      sortArrayList.Sort();
      return sortArrayList[0];
}
public static object GetMaxValue(ArrayList arrList)
{
     ArrayList sortArrayList = arrList;
     sortArrayList.Sort();
     sortArrayList.Reverse();
     return sortArrayList[0];
}