Python: Find all index positions of the maximum and minimum values in a given list

Last update on April 19 2025 13:01:50 (UTC/GMT +8 hours)

Index of Max and Min Values in List

Write a Python program to find all index positions of the maximum and minimum values in a given list of numbers.

Sample Solution:

Python Code:

# Define a function 'position_max_min' that finds the index positions of the maximum and minimum values in a list
def position_max_min(nums):
    # Find the maximum and minimum values in the 'nums' list
    max_val = max(nums)
    min_val = min(nums)

    # Create a list 'max_result' with the index positions of the maximum value in 'nums'
    max_result = [i for i, j in enumerate(nums) if j == max_val]

    # Create a list 'min_result' with the index positions of the minimum value in 'nums'
    min_result = [i for i, j in enumerate(nums) if j == min_val]

    # Return both 'max_result' and 'min_result'
    return max_result, min_result

# Create a list 'nums' with numeric values
nums = [12, 33, 23, 10, 67, 89, 45, 667, 23, 12, 11, 10, 54]

# Print a message indicating the original list
print("Original list:")
# Print the contents of 'nums'
print(nums)

# Call the 'position_max_min' function with 'nums' and store the result in 'result'
result = position_max_min(nums)

# Print a message indicating the index positions of the maximum value in the list
print("\nIndex positions of the maximum value of the said list:")
# Print the index positions of the maximum value from 'result'
print(result[0])

# Print a message indicating the index positions of the minimum value in the list
print("\nIndex positions of the minimum value of the said list:")
# Print the index positions of the minimum value from 'result'
print(result[1]) 

Sample Output:

Original list:
[12, 33, 23, 10, 67, 89, 45, 667, 23, 12, 11, 10, 54]

Index positions of the maximum value of the said list:
[7]

Index positions of the minimum value of the said list:
[3, 11]

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to find the second highest and lowest values in a list.
• Write a Python program to get the index of all peak values in a list.
• Write a Python program to locate positions of outliers in a list.
• Write a Python program to determine the range between max and min values.

Go to:

• Python Data Type List Exercises Home ↩
• Python Exercises Home ↩

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