how to combine the two columns without ignoring the zero within one of the data column

To combine the two columns without ignoring the zero within one of the data columns, you can convert the columns to strings and then use string concatenation. Here's an example:

import pandas as pd

# Create an example DataFrame
df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]})

# Combine the columns without ignoring the zero
df['C'] = df['A'].astype(str) + '0' + df['B'].astype(str)

print(df)

Output:

   A  B   C
0  1  4  104
1  2  5  205
2  3  6  306

In the above code, we use `astype(str)` to convert columns `A` and `B` to strings. Then, we use string concatenation (`+`) to combine the columns. We add `'0'` in between the values to ensure it is included in the merged result. The result is assigned to a new column `C`.