About
In this code snippet, we will take a look at ranges in C#.
Ranges give you a quick and easy syntax to get a range/interval of elements from a collection. For example, if an array has 10 elements you can specify a range from the 2nd to the 5th element and that slice of the array will be returned to you.
Let’s have a look at the code below to see how to use ranges.
Code:
string myString = "Hello World!";
//Get substring starting from 3th position on.
Console.WriteLine(myString[3..]);
//Get substring from start till the 3th position.
Console.WriteLine(myString[..3]);
//Get substring from 2rd to 5th position.
Console.WriteLine(myString[2..5]);
//Get substring from start to 2nd position from the end.
Console.WriteLine(myString[..^2]);
Console.WriteLine("");
//The same thing can be applied to arrays.
int[] myArray = new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
int[] myArrayPart = null;
myArrayPart = myArray[3..];
myArrayPart.ToList().ForEach(x => Console.Write(x));
Console.WriteLine();
myArrayPart = myArray[..3];
myArrayPart.ToList().ForEach(x => Console.Write(x));
Console.WriteLine();
myArrayPart = myArray[2..5];
myArrayPart.ToList().ForEach(x => Console.Write(x));
Console.WriteLine();
myArrayPart = myArray[..^2];
myArrayPart.ToList().ForEach(x => Console.Write(x));
Console.WriteLine();
Console.ReadLine(); Resulting output:
