Ruby | Enumerable count() function

The count() of enumerable is an inbuilt method in Ruby returns the number of elements in the enumerable, or the number of elements that are equal to a given element, or the number of items which satisfies the condition in the given block.

Syntax: block.count { |obj| block } or block.count(element)

Parameters: The function takes a block or an item. If it does not takes any of both, then it returns the number of elements in the enumerable.



Return Value: It returns the count of elements.

Example 1:

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# Ruby program for count method in Enumerable
  
# Initialize
enu = [12, 18]
  
# returns enumerator
res = enu.count

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Output:

2

Example 2:

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# Ruby program for count method in Enumerable
  
# Initialize
enu = [12, 18, 12]
  
# returns enumerator
res = enu.count(12)

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Output:

2

Example 3:

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# Ruby program for count method in Enumerable
  
# Initialize
enu = [12, 18, 16, 18]
  
# returns enumerator
res = enu.count { |el| el > 13}

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Output:

3


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