Batch convert columns to numeric type

Question

I have a dataframe with a bunch of columns that I need to convert to the numeric type. I have written the following code to try to do this, however it is saying the replacem

Answer 1

Combining the answer by @Andrii with the comment by @RobertYi, my short suggestion is

df[] <- sapply(df, as.numeric)

This ensures that the result stays as data frame.