Add zero columns to Pandas Dataframe

# import pandas library
import pandas as pd
# creating dictionary of lists
dict = {'name': ["sohom", "rakesh", "rajshekhar", "sumit"],
        'department': ["ECE", "CSE", "EE", "MCA"],
        'CGPA': [9.2, 8.7, 8.6, 7.7]}
# creating a dataframe
df = pd.DataFrame(dict)
print("data frame before adding the column:")
display(df)
# creating a new column
# of zeroes to the
# dataframe
df['new'] = 0
# showing the dataframe
print("data frame after adding the column:")
display(df)

# import pandas library
import pandas as pd
# create data
data = [["geeks", 1], ["for", 2], ["best", 3]]
# creating a dataframe
df = pd.DataFrame(data, columns=['col1', 'col2'])
print("data frame before adding the column:")
display(df)
# creating a new column with all zero entries
df['col3'] = 0
# showing the dataframe
print("data frame after adding the column:")
display(df)