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# Python program to count Even and Odd numbers in a Dictionary

• Last Updated : 24 Jan, 2023

Given a python dictionary, the task si to count even and odd numbers present in the dictionary.

Examples:

Input : {‘a’: 1, ‘b’: 2, ‘c’: 3, ‘d’: 4, ‘e’ : 5}
Output : Even = 2, odd = 3
Input : {‘x’: 4, ‘y’:9, ‘z’:16}
Output : Even = 2, odd = 1

Approach using values() Function: Traverse the dictionary and extract its elements using values() function and for each extracted value, check if it is even or odd. Finally, print the respective counts.

## Python3

 `# Python3 Program to count even and` `# odd numbers present in a dictionary`   `# Function to count even and odd` `# numbers present in a dictionary` `def` `countEvenOdd(``dict``):` `    `  `    ``# Stores count of even` `    ``# and odd elements` `    ``even ``=` `0` `    ``odd ``=` `0` `    `  `    ``# Traverse the dictionary` `    ``for` `i ``in` `dict``.values():` `      `  `      ``if` `i ``%` `2` `=``=` `0``:` `        ``even ``=` `even ``+` `1` `      ``else``:` `        ``odd ``=` `odd ``+` `1` `        `  `    ``print``(``"Even Count: "``, even)` `    ``print``(``"Odd Count: "``, odd)`   `# Driver Code`   `dict` `=` `{``'a'``: ``1``, ``'b'``: ``2``, ``'c'``: ``3``, ``'d'``: ``4``, ``'e'``: ``5``}` `countEvenOdd(``dict``)`

Output:

```Even Count:  2
Odd Count:  3```

Time Complexity: O(N), where N is the length of dict
Auxiliary Space: O(1)

Alternate Approach: Iterate over each item in the dictionary, and for each element, check if it is even or odd.  Finally, print the respective counts.

## Python3

 `# Python3 Program to count even` `# and odd elements in a dictionary`   `# Function to count even and` `# odd elements in a dictionary` `def` `countEvenOdd(``dict``):` `  ``even ``=` `0` `  ``odd ``=` `0` `  `  `  ``# Iterate over the dictionary` `  ``for` `i ``in` `dict``:` `    `  `    ``# If current element is even` `    ``if` `dict``[i] ``%` `2` `=``=` `0``:` `      `  `      ``# Increase count of even` `      ``even ``=` `even ``+` `1` `      `  `    ``# Otherwise` `    ``else``:` `      `  `      ``# Increase count of odd` `      ``odd ``=` `odd ``+` `1` `      `  `  ``print``(``"Even count: "``, even)` `  ``print``(``"Odd count: "``, odd)` `    `  `# Driver Code`   `# Given Dictionary` `dict` `=` `{``'a'``: ``1``, ``'b'``: ``2``, ``'c'``: ``3``, ``'d'``: ``4``, ``'e'``: ``5``}`   `countEvenOdd(``dict``)`

Output:

```Even count:  2
Odd count:  3```

Time Complexity: O(N), where N is the length of dict
Auxiliary Space: O(1)

Approach : Using bitwise & operator

## Python3

 `# Python3 Program to count even` `# and odd elements in a dictionary ` `#using bitwise operator`   `def` `fun1(x):` `    ``if``(x&``1``!``=``0``): ``# Using bitwise opearor` `        ``return` `x` `# Given Dictionary` `dict` `=` `{``'a'``: ``1``, ``'b'``: ``2``, ``'c'``: ``3``, ``'d'``: ``4``, ``'e'``: ``5``}` `x``=``list``(``dict``.values())` `y``=``filter``(fun1,x)` `odd``=``len``(``list``(y))` `even``=``len``(x)``-``odd` `print``(``"Even count: "``, even)` `print``(``"Odd count: "``, odd)`   `#This code contributed by vinay pinjala.`

Output

```Even count:  2
Odd count:  3```

Time Complexity: O(N), where N is the length of dict
Auxiliary Space: O(N)

Approach : Using values(),filter() and len() methods

## Python3

 `# Python3 Program to count even` `# and odd elements in a dictionary`   `def` `fun1(x):` `    ``if``(x``%``2``=``=``0``):` `        ``return` `x` `# Given Dictionary` `dict` `=` `{``'a'``: ``1``, ``'b'``: ``2``, ``'c'``: ``3``, ``'d'``: ``4``, ``'e'``: ``5``}` `x``=``list``(``dict``.values())` `y``=``filter``(fun1,x)` `even``=``len``(``list``(y))` `odd``=``len``(x)``-``even` `print``(``"Even count: "``, even)` `print``(``"Odd count: "``, odd)`

Output

```Even count:  2
Odd count:  3```

Time Complexity: O(N), where N is the length of dict
Auxiliary Space: O(N)

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