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Python: Find the index of the largest prime in the list and the sum of its digits

Python Programming Puzzles: Exercise-76 with Solution

Write a Python program to find the index of the largest prime in the list and the sum of its digits.

Input:  
[3, 7, 4] 
Output:
[1, 7]

Input:  
[3, 11, 7, 17, 19, 4]
Output:
[4, 10]

Input:  
[23, 17, 201, 14, 10473, 43225, 421, 423, 11, 10, 2022, 342157]
Output:
[6, 7]

Pictorial Presentation:

Python: Find the index of the largest prime in the list and the sum of its digits.

Sample Solution:

Python Code:

#License: https://bit.ly/3oLErEI

def test(nums):
    n, i = max((n, i) for i, n in enumerate(nums) if is_prime(n))
    return [i, sum(int(c) for c in str(n))]
def is_prime(n):
    return n > 1 and all(n % j for j in range(2, int(n ** 0.5) + 1))
    
nums = [3, 7, 4]
print("List of numbers:",nums)
print("Index of the largest prime in the said list and the sum of its digits:")
print(test(nums))
nums = [3, 11, 7, 17, 19, 4]
print("\nList of numbers:",nums)
print("Index of the largest prime in the said list and the sum of its digits:")
print(test(nums))
nums = [23, 17, 201, 14, 10473, 43225, 421, 423, 11, 10, 2022, 342157]
print("\nList of numbers:",nums)
print("Index of the largest prime in the said list and the sum of its digits:")
print(test(nums))

Sample Output:

List of numbers: [3, 7, 4]
Index of the largest prime in the said list and the sum of its digits:
[1, 7]

List of numbers: [3, 11, 7, 17, 19, 4]
Index of the largest prime in the said list and the sum of its digits:
[4, 10]

List of numbers: [23, 17, 201, 14, 10473, 43225, 421, 423, 11, 10, 2022, 342157]
Index of the largest prime in the said list and the sum of its digits:
[6, 7]

Flowchart:

Flowchart: Python - Reorder numbers in increasing/decreasing order based on whether the first plus last element is even/odd.

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Python Code Editor :

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Python: Tips of the Day

Clamps num within the inclusive range specified by the boundary values x and y:

Example:

def tips_clamp_num(num,x,y):
  return max(min(num, max(x, y)), min(x, y))
print(tips_clamp_num(2, 4, 6))
print(tips_clamp_num(1, -1, -6))

Output:

4
-1