17 lines
519 B
Python
17 lines
519 B
Python
# Lesson 2 Task 3: display all numbers from n to 1, then remove the first number and repeat while n > 0
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# Author: Stanislav Mykhailenko
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# License: Unlicense
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try:
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number = int(input("Enter a natural number: "))
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if number < 1:
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raise ValueError("A natural number is required.")
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for biggestNumber in range(number, 0, -1):
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for currentNumber in range(biggestNumber, 0, -1):
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print(currentNumber, end='')
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if currentNumber > 1: print(' ', end='')
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print('')
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except ValueError:
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print("Invalid number entered.")
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