Get MAX and MIN Values in ArrayList

Question

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<temp)
{
Max = temp;
}
if(Min > temp)
{
Min = temp;
}
}

Vulpes · Answer

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 { Max = x; } if(Min > x) { Min = x; } } Console.WriteLine(Minimum value is  + Min); Console.WriteLine(Maximum value is  + Max); Values.Sort(); Console.WriteLine(
The elements in sorted order are
); 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

Sumit Jolly · Answer

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]; }