Python Program to check if given array is Monotonic

In this article, we will learn to check whether the array is monotonic or not using the python program.

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What is the monotonic array?

An array that is continuous increases or continuous decreases is said to be a monotonic array.

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Explanation

Let's take any array,

arr = [1, 2, 3, 4, 5, 6 ]

when i <= j

arr[i] <= arr[j]

Then this array is said to be monotnic increasing.

arr = [11, 8, 5, 2, 1]

when i >=j

arr[i] >= arr[j]

Then this array is said to be monotonic decreasing.

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Program

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# make a function that check the condition for monotonics
def monotonic(arr):
    # if all the elements in the increase order or decrease order then return true.
     return (all(arr[i] <= arr[i + 1] for i in range(len(arr) - 1)) or
            all(arr[i] >= arr[i + 1] for i in range(len(arr) - 1)))

# array initisilze
arr = [1,5,7,11,21,32]

# print the result
print(monotonic(arr))

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Output

True