JuniorTheoryCommon

What does the program print (lines separated by spaces)?

int[] a = [10, 20, 30, 40, 50];
int[] part = a[1..3];
part[0] = 99;
Console.WriteLine(a[^1]);
Console.WriteLine(part.Length);
Console.WriteLine(a[1]);

50 2 20

Expecting 50 3 20: the end of a range is not included, so a[1..3] holds only the elements at indexes 1 and 2.
Expecting 99 or 40: a range of an array is a new array, so part[0] = 99 leaves a alone, and ^1 is the last element, not the one before it.

What does a[^2..] hold for the same array?
What happens if the program prints a[^0]?

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JuniorTheoryCommon

What does the program print (lines separated by spaces)?

int[] a = [10, 20, 30, 40, 50];
int[] part = a[1..3];
part[0] = 99;
Console.WriteLine(a[^1]);
Console.WriteLine(part.Length);
Console.WriteLine(a[1]);

50 2 20

Expecting 50 3 20: the end of a range is not included, so a[1..3] holds only the elements at indexes 1 and 2.
Expecting 99 or 40: a range of an array is a new array, so part[0] = 99 leaves a alone, and ^1 is the last element, not the one before it.

What does a[^2..] hold for the same array?
What happens if the program prints a[^0]?

Back to questions Open topic in roadmap →Answer it yourself — Quiz