minimum and max value in all columns pandas

1#for multiple columns 
2min_vals = df[["A","B","C"]].min() #can add how much ever columns
3max_vals = df[["D","E","F"]].max() #can add how much ever columns
4
5#for single column
6min_val = df["Column"].min() 
7max_val = df["Column"].max() 
8
9#to refer to all columns
10min_val = df[:].min() 
11max_val = df[:].max() 

1max_value_column = df["column_name"].max()

1max_value = column.max()