1 1 6.3 Truth Values and Conditions 1 =============================== 1 1 In certain contexts, expression values also serve as "truth values"; 1 i.e., they determine what should happen next as the program runs. This 1 minor node describes how 'awk' defines "true" and "false" and how values 1 are compared. 1
1
· Truth Values What is "true" and what is "false".
· Typing and Comparison How variables acquire types and how this
1 affects comparison of numbers and strings with
1 '<', etc.
· Boolean Ops Combining comparison expressions using boolean
1 operators '||' ("or"), '&&'
1 ("and") and '!' ("not").
· Conditional Exp Conditional expressions select between two
1 subexpressions under control of a third
1 subexpression.
1