How to compare a specific condition on a dataframe row?

Question

I have a dataframe where if a specific string is in a row then print that value.

dataframe:

date                       floor
18:26:41                   4th-floor
18:26:41                   2nd-floor
18:26:41                   4th-floor
18:26:41                   4th-floor

Code I have tried:

for floor in df:
    if df.floor.str.contains("4th-floor"):
        print("success")