Finding the maximum of absolute numbers

Question

Is there any quick way of turning all the members of an array into absolute and find the max number among them? For example in this array:

-100 25 43

The max is 43, but I want to get 100 from my code. Is there's any simple/fast method that I can use to find max regardless of its sign? or do I have to use a for loop to turn all the array members into absolute and then find the max among them?

Answer 1

Try this:

int[] array = {-100, 25, 43};
int max = array.Select(Math.Abs).Max();

Answer 2

This works:

var numbers = new[] { -100, 25, 43 };

var absoluteMax = numbers.Select(x => Math.Abs(x)).Max();

I get 100 as requested.

Do be careful if one of your numbers is int.MinValue then you get an OverflowException - "Negating the minimum value of a twos complement number is invalid."