what are Ranges : Range Creation « Range « Ruby

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Ruby » Range » Range Creation 
what are Ranges


Ruby has ranges, with range operators and a Range class
Ranges are intervals with a start value and an end value, separated by a range operator. 
There are two range operators, .. (two dotsand ... (three dots)
The range operator .. means an inclusive range of numbers. 
1..10 means a range of numbers from to 10, including 10 (1234567910)
The range operator ... means an exclusive range of numbers that exclude the last in the series; 
in other words, 1...10 means a range of numbers from to 9, as the 10 at the end of the range is excluded (12345679).

The === method determines if a value is a member of, or included in, a range

(1..25=== 14 # => true, in range
(1..25=== 26 # => false, out of range
(1...25=== 25 # => false, out of range if ... used

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