Python | Pandas Index.is_monotonic_increasing Last Updated : 20 Feb, 2019 Comments Improve Suggest changes Like Article Like Report Pandas Index is an immutable ndarray implementing an ordered, sliceable set. It is the basic object which stores the axis labels for all pandas objects. Pandas Index.is_monotonic_increasing attribute return True if the underlying data in the given Index object is monotonically increasing else it return False. Syntax: Index.is_monotonic_increasing Parameter : None Returns : boolean Example #1: Use Index.is_monotonic_increasing attribute to find out if the underlying data in the given Index object is monotonically increasing or not. Python3 # importing pandas as pd import pandas as pd # Creating the index idx = pd.Index([100, 200, 420, 888, 924]) # Print the index print(idx) Output : Now we will use Index.is_monotonic_increasing attribute to find out if the underlying data in the given Index object is monotonically increasing or not. Python3 1== # check if the values in the Index # are monotonically increasing result = idx.is_monotonic_increasing # Print the result print(result) Output : As we can see in the output, the Index.is_monotonic_increasing attribute has returned True indicating that the underlying data of the given Index object is monotonically increasing. Example #2 : Use Index.is_monotonic_increasing attribute to find out if the underlying data in the given Index object is monotonically increasing or not. Python3 # importing pandas as pd import pandas as pd # Creating the index idx = pd.Index(['2012-12-12', None, '2002-1-10', None]) # Print the index print(idx) Output : Now we will use Index.is_monotonic_increasing attribute to find out if the underlying data in the given Index object is monotonically increasing or not. Python3 1== # check if the values in the Index # are monotonically increasing result = idx.is_monotonic_increasing # Print the result print(result) Output : As we can see in the output, the Index.is_monotonic_increasing attribute has returned False indicating that the underlying data of the given Index object is not monotonically increasing. Comment More infoAdvertise with us Next Article Python | Pandas Index.is_monotonic_increasing S Shubham__Ranjan Follow Improve Article Tags : Python Pandas Python-pandas Python pandas-indexing AI-ML-DS With Python +1 More Practice Tags : python Similar Reads Python | Pandas Index.is_monotonic_decreasing Pandas Index is an immutable ndarray implementing an ordered, sliceable set. It is the basic object which stores the axis labels for all pandas objects. 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