$bytes

Returns comma formatted filesize.

$bytes(N,bkmgt3).suf

The bkmgt options return the result as bytes, kilobytes, megabytes, gigabytes or tegabytes.
Using option 3 would return is the best human readable style and is the default option.
The suf property appends B,KB,MB,GB or TG depending on what formatting is being used.

Examples

echo -ag $bytes(1024,k)  ;Returns 1 because there is 1 kilobyte in 1024 bytes
echo -ag $bytes(123456,m)  ;Returns 0.12 because there is 0.12 megabytes in 123456 bytes

echo -ag $bytes($file($sfile($mircdir)).size).suf  ;Returns the size of the file you selected in the best human readable form with its suffix appended.