pandas dataframe add two columns int and string

df1 = df['1st Column Name'].map(str) + df['2nd Column Name'].map(str) + ...

Here is what the above code is Doing:
1. We’re creating a new column in the df dataframe called ‘new_column’.
2. We’re using the map function to convert all the values in the ‘1st Column Name’ column to strings.
3. We’re adding the string values in the ‘1st Column Name’ column to the string values in the ‘2nd Column Name’ column.
4. We’re repeating step 3 for all the other columns we want to concatenate.
5. We’re assigning the concatenated values to the ‘new_column’ column.