Find if array is in increasing order or decreasing order in python

increasing_decreasing.py

def checkType(arr, n):
    # If the first two and the last two elements
    # of the array are in increasing order
    if (arr[0] <= arr[1] and arr[n-2] <= arr[n-1]):
        print("Increasing");
            
    elif (arr[0] >= arr[1] and arr[n-2] >= arr[n-1]):
        print("Decreasing");
        
        
# Driver code
if __name__ == "__main__" :
 
    arr = [17,15,13,11,9,7,5,3]
    n = len(arr);
 
    checkType(arr, n);