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Range
The Range operator creates a collection that contains a sequence of numbers. It takes two parameters.
The first is the integer value at which to start the sequence, and the second is the number of sequential
integers to generate.
Here??™s an example in which the Range operator is used to generate a sequence of numbers starting at 1
and stopping at 10:
var coolmath = Enumerable.Range(1, 10);
for each (int num in coolmath)
listbox1.Items.Add(num);
The results are
1
2
3
4
6
7
8
9
10
72
Chapter 4: LINQ Standard Query Operators
Other operators can be added to this as well. The following example generates a list of numbers from 1
to 10 but also uses the Reverse operator to generate them backward.
var coolmath = Enumerable.Range(1, 10).Reverse();
for each (int num in coolmath)
listbox1.Items.Add(num);
The results are
10
9
8
7
6
5
4
3
2
1
In the next example, the Range operator is used to create a sequence of numbers from 1 to 5 and then
multiply each number by 5:
var coolmath = Enumerable.Range(1, 5).Select(x => x * 5);
for each (int num in coolmath)
listbox1.


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