Next: Function Calls, Previous: All Operators, Up: Expressions [Contents][Index]
In certain contexts, expression values also serve as “truth values”; i.e.,
they determine what should happen next as the program runs. This
section describes how awk defines “true” and “false”
and how values are compared.
| • Truth Values | What is “true” and what is “false”. | |
| • Typing and Comparison | How variables acquire types and how this affects comparison of numbers and strings with ‘<’, etc. | |
| • Boolean Ops | Combining comparison expressions using boolean operators ‘||’ (“or”), ‘&&’ (“and”) and ‘!’ (“not”). | |
| • Conditional Exp | Conditional expressions select between two subexpressions under control of a third subexpression. |