Deleting a column using the `iloc` function of `dataframe` and `slicing`, when we have a typical column name with unwanted values:

 df = df.iloc[:,1:] # Removing an unnamed index column

Here `0` is the default row and `1` is the first column so `,1` where starts and stepping is taking default values, hence `:,1:` is our parameter for deleting the first column.