Difference between using .loc() in assignment and removing it

I want to know what is the difference between these 2 lines:
1- f500.loc[‘Dow Chemical’,‘ceo’] = ‘Jim Fitterling’
2-f500.[‘Dow Chemical’,‘ceo’] = ‘Jim Fitterling’

hey @ahmedemam576

can you please attach the link to the mission. we will be able to help you better that way. Thanks.