Back to ChallengesCheck if an Array is SortedEasy 10 min

Check if an Array is Sorted

Given an array of size n, write a program to check if the given array is sorted in strictly increasing order or not.

Return true if it is, otherwise false.

Input: arr = [10, 20, 30, 40, 50]

Output: true

The array is strictly increasing.

Input: arr = [10, 20, 30, 30, 50]

Output: false

It is not strictly increasing because 30 appears twice.

Time

O(N)

iterating through the array once.

Space

O(1)

constant extra space.

#1 Strictly sorted

Input: arr = [10, 20, 30, 40, 50]

Expected: true

#2 Not strictly sorted (duplicates)

Input: arr = [10, 20, 30, 30, 50]

Expected: false

JavaScript

Output

Click "Run Code" to see output here...