Version 2 of true

Updated 2006-08-19 17:54:03 by dkf

True is a boolean value. It is recognised by expr.

1. True values are yes, on, true, their abbrevations, and non-zero integers,
2. False values are no, off, false, their abbrevations, and the integer 0.

The function string is true returns true if its argument obeys the condition 1. above (and string is false does the opposite).