Course Content

Course Content


Sequences have a beginning, an end, and a method for producing subsequent values in the sequence. The range operators ".." and "..." are used by Ruby to produce these sequences. The two-dot form creates a range that includes the provided high number, but the three-dot form creates a range that excludes it.

The range() function returns a number series that starts at 0 and increments by 1 (by default) before stopping at a specified value.

In a for loop, one of the most typical uses of the range() function is to iterate through a series of variables. This is very useful if you want to access all of the values in a list or array, or just every other item, for example. The range() method generates a series from 0 to 4 in this example.

Benefits of using Range Operators

  • It is easy to find out how much space is left in an array.
  • It is easy to find out how many items are in an array.
  • It is easy to iterate through the elements of an array and perform some operations on each element.

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