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Challenge 151: Sorted Array?

curriculum/challenges/english/blocks/daily-coding-challenges-python/69373793f5a867f769cde136.md

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--description--

Given an array of numbers, determine if the numbers are sorted in ascending order, descending order, or neither.

If the given array is:

  • In ascending order (lowest to highest), return "Ascending".
  • In descending order (highest to lowest), return "Descending".
  • Not sorted in ascending or descending order, return "Not sorted".

--hints--

is_sorted([1, 2, 3, 4, 5]) should return "Ascending".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(is_sorted([1, 2, 3, 4, 5]), "Ascending")`)
}})

is_sorted([10, 8, 6, 4, 2]) should return "Descending".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(is_sorted([10, 8, 6, 4, 2]), "Descending")`)
}})

is_sorted([1, 3, 2, 4, 5]) should return "Not sorted".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(is_sorted([1, 3, 2, 4, 5]), "Not sorted")`)
}})

is_sorted([3.14, 2.71, 1.61, 0.57]) should return "Descending".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(is_sorted([3.14, 2.71, 1.61, 0.57]), "Descending")`)
}})

is_sorted([12.3, 23.4, 34.5, 45.6, 56.7, 67.8, 78.9]) should return "Ascending".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(is_sorted([12.3, 23.4, 34.5, 45.6, 56.7, 67.8, 78.9]), "Ascending")`)
}})

is_sorted([0.4, 0.5, 0.3]) should return "Not sorted".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(is_sorted([0.4, 0.5, 0.3]), "Not sorted")`)
}})

--seed--

--seed-contents--

py
def is_sorted(arr):

    return arr

--solutions--

py
def is_sorted(arr):
    ascending = True
    descending = True

    for i in range(1, len(arr)):
        if arr[i] < arr[i - 1]:
            ascending = False
        if arr[i] > arr[i - 1]:
            descending = False

    if ascending:
        return "Ascending"
    if descending:
        return "Descending"
    return "Not sorted"