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Python: Create the largest possible number using the elements of a given list of integers

Python List: Exercise - 179 with Solution

Write a Python program to create the largest possible number using the elements of a given list of positive integers.

Sample Solution:

Python Code:

def create_largest_number(lst):
    if all(val == 0 for val in lst):
        return '0'
    result = ''.join(sorted((str(val) for val in lst), reverse=True,
                      key=lambda i: i*( len(str(max(lst))) * 2 // len(i))))
    return result
nums = [3, 40, 41, 43, 74, 9]
print("Original list:")
print(nums)
print("Largest possible number using the elements of the said list of positive integers:")
print(create_largest_number(nums))

nums = [10, 40, 20, 30, 50, 60]
print("\nOriginal list:")
print(nums)
print("Largest possible number using the elements of the said list of positive integers:")
print(create_largest_number(nums))
nums = [8, 4, 2, 9, 5, 6, 1, 0]
print("\nOriginal list:")
print(nums)
print("Largest possible number using the elements of the said list of positive integers:")
print(create_largest_number(nums))

Sample Output:

Original list:
[3, 40, 41, 43, 74, 9]
Largest possible number using the elements of the said list of positive integers:
9744341403

Original list:
[10, 40, 20, 30, 50, 60]
Largest possible number using the elements of the said list of positive integers:
605040302010

Original list:
[8, 4, 2, 9, 5, 6, 1, 0]
Largest possible number using the elements of the said list of positive integers:
98654210

Pictorial Presentation:

Python List: Create the largest possible number using the elements of a given list of integers.

Flowchart:

Flowchart: Create the largest possible number using the elements of a given list of integers.

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Previous: Write a Python program to insert a specified element in a given list after every nth element.
Next: Write a Python program to create the smallest possible number using the elements of a given list of positive integers.

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Python: Tips of the Day

Floor Division:

When we speak of division we normally mean (/) float division operator, this will give a precise result in float format with decimals.

For a rounded integer result there is (//) floor division operator in Python. Floor division will only give integer results that are round numbers.

print(1000 // 300)
print(1000 / 300)

Output:

3
3.3333333333333335