Python: Find the minimum even value and its index from a given array of numbers

Last update on May 30 2025 11:50:04 (UTC/GMT +8 hours)

Minimum Even Value and Index

Given an array of numbers representing a branch on a binary tree, write a Python program to find the minimum even value and its index. In the case of a tie, return the smallest index. If there are no even numbers, the answer is [].

Input:
[1, 9, 4, 6, 10, 11, 14, 8]
Output:
Minimum even value and its index of the said array of numbers:
[4, 2]
Input:
[1, 7, 4, 4, 9, 2]
Output:
Minimum even value and its index of the said array of numbers:
[2, 5]
Input:
[1, 7, 7, 5, 9]
Output:
Minimum even value and its index of the said array of numbers:
[]

Visual Presentation:

Sample Solution:

Python Code:

# Define a function named 'test' that takes a list of numbers 'nums' as input
def test(nums):
    # Check if any element in 'nums' is even
    if any(n % 2 == 0 for n in nums):
        # If there is an even number, find the minimum even value and its index
        return min([v, i] for i, v in enumerate(nums) if v % 2 == 0)
    else:
        # If there are no even numbers, return an empty list
        return []

# Assign a specific list of numbers to the variable 'nums'
nums =  [1, 9, 4, 6, 10, 11, 14, 8]
# Print a message indicating the original list of numbers
print("Original list:")
# Print the original list of numbers
print(nums)
# Print a message indicating the minimum even value and its index
print("Minimum even value and its index of the said array of numbers:")
# Print the result of the test function applied to 'nums'
print(test(nums))

# Assign another specific list of numbers to the variable 'nums'
nums =  [1, 7, 4, 4, 9, 2]
# Print a message indicating the original list of numbers
print("\nOriginal list:")
# Print the original list of numbers
print(nums)
# Print a message indicating the minimum even value and its index
print("Minimum even value and its index of the said array of numbers:")
# Print the result of the test function applied to 'nums'
print(test(nums))

# Assign another specific list of numbers to the variable 'nums'
nums =  [1, 7, 7, 5, 9]
# Print a message indicating the original list of numbers
print("\nOriginal list:")
# Print the original list of numbers
print(nums)
# Print a message indicating the minimum even value and its index
print("Minimum even value and its index of the said array of numbers:")
# Print the result of the test function applied to 'nums'
print(test(nums))

Sample Output:

Original list:
[1, 9, 4, 6, 10, 11, 14, 8]
Minimum even value and its index of the said array of numbers:
[4, 2]
Original list:
[1, 7, 4, 4, 9, 2]
Minimum even value and its index of the said array of numbers:
[2, 5]
Original list:
[1, 7, 7, 5, 9]
Minimum even value and its index of the said array of numbers:
[]

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to find the minimum even number in a list along with its index; return an empty list if none exist.
• Write a Python program to iterate over a list and track the smallest even number and its first occurrence index.
• Write a Python program to use enumerate() and filtering to obtain the even numbers and then determine the minimum and its index.
• Write a Python program to implement this search recursively and return the even number with the lowest index if there’s a tie.

Go to:

• Python Puzzles Exercises Home ↩
• Python Exercises Home ↩

Previous: Find all even palindromes up to n.
Next: Filter for the numbers in a list whose sum of digits is >0, where the first digit can be negative..

Python Code Editor :

Have another way to solve this solution? Contribute your code (and comments) through Disqus.