Ruby Iterators

Iterator is a concept used in object-oriented language. Iteration means doing one thing many times like a loop.

The loop method is the simplest iterator. They return all the elements from a collection, one after the other. Arrays and hashes come in the category of collection.

Ruby Each Iterator

The Ruby each iterator returns all the elements from a hash or array.

Syntax:

Here collection can be any array, range or hash.

Example:

Output:

Ruby Times Iterator

A loop is executed specified number of times by the times iterator. Loop will start from zero till one less than specified number.

Syntax:

Here, at place of x we need to define number to iterate the loop.

Example:

Output:

Ruby Upto and Downto Iterators

An upto iterator iterates from number x to number y.

Syntax:

Example:

Output:

Ruby Step Iterator

A step iterator is used to iterate while skipping over a range.

Syntax:

Here, x is the range which will be skipped during iteration.

Example:

Output:

Ruby Each_Line Iterator

A each_line iterator is used to iterate over a new line in a string.

Example:

Output: