Range Creation « Range « Ruby

1.what are Ranges
2.With the Range class, you can also create a range
3.To create a range, use the .. operator. For example, here's how you might create the range 1 to 4:
4.use the ... operator, which is the same thing except that the final item in the range is omitted
5.Reference to_a from a range
6.Reference to_a from a range in an excluded range
7.Reference to_a from a letter-based range
8.You have to create ranges in ascending sequence
9.Variable based range