how to add the sum of multiple columns into another column in a dataframe
print(df)
Apples Bananas Grapes Kiwis
0 2.0 3.0 NaN 1.0
1 1.0 3.0 7.0 NaN
2 NaN NaN 2.0 3.0
df['Fruit Total']=df.iloc[:,-4:].sum(axis=1)
print(df)
Apples Bananas Grapes Kiwis Fruit Total
0 2.0 3.0 NaN 1.0 6.0
1 1.0 3.0 7.0 NaN 11.0
2 NaN NaN 2.0 3.0 5.0