I was trying to get the substring from a string I am using in my program as follows:
mystring.Substring(mystring.Length - 4)
The Visual Studio IntelliSense recommended I use index and range operators as follows:
mystring[^4..]
I glanced through the documentation here and it seems like using just mystring[^4] would work just fine. Why does the IntelliSense recommend to use the extra .. in there, are there any benefits from adding it?
>Solution :
^4 is an index, representing a single index number which just so happens to be 4 away from the end of the array. This is essentially the same as doing mystring[0], just dynamically figuring out the number based on the length.
^4.. is a range, which means everything between (and including) the 4th-to-last index and the end of the array.
var input = "abcdefghijk";
Console.WriteLine(input[^4]);
Console.WriteLine(input[^4..]);
This prints
h hijk