ls-command: how to display the file size?

ls-command: how to display the file size?

ls -lah

-l use a long listing format

-a, –all do not hide entries starting with.

-h –human-readable
When used with the -l option, use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the number of digits to three or less using base 2 for sizes.

ls2