How can I create a new column containing the absolute value of another column in the dataset?

[Rawl]

Hi, I'm new to SAS and this is my first time using it.

I managed to get an output showing both the regular variable and the one with absolute values. However, all of the other columns of the database disappeared. How can I add this new column to the entire dataset?

Thanks!

[Reeza]

Change how you created the new column. How did you create the new columns?