Editing logical operator

In [[awk]], *logical operators* are used to perform [[boolean]] operations, and a return a value of [true] or [false], depending on the values of the [operand]s. | *Operator* | *Symbol* | *Description* | [[and]] | [[doubleampersand &&]] | Returns [true] if both [[operand]]s are [[true]], otherwise returns [[false]] | [[or]] | [[doublepipe]] | Returns [[true]] if either or both [[operand]]s are [[true]], otherwise returns [[false]] | [[not]] | [[pling !]] | Returns [[false] if [[operand]] is [[true]], otherwise returns [[true]] Traditionally, [[awk]] does not provide a logical [[xor]] operator == Results of Logical Operations * [[Results of Logical Operations]] The [[logical]] operators return a [[boolean]] value of 0 for [[false]], and 1 for [[true]]. In [[awk]], the null [[string]]s "" are treated as [[false]] expressions, a non null string is true: {{{ awk print (0 && 0) # 0 (false) print (0 && 7) # 0 (false) print (7 && 0) # 0 (false) print (7 && 2) # 1 (true) print (2 && 7) # 1 (true) print ("" && "") # 0 (null strings are treated as false) print ("apples" && "pears") # 1 (true) print (0 || 7) # 1 (true) print (7 || 0) # 1 (true) print (7 || 2) # 1 (true) print (2 || 7) # 1 (true) print ("" || "") # 0 (null strings are treated as false) print ("apples" || "pears") # 1 (true) }}} == Precedence * [[Precedence of logical operators]] The unary [[NOT]] operator has a higher [[precedence]] than the dyadic [[AND]] and [[OR]] operators: *This article requires an example. Please insert an example here. * == Associativity The [[dyadic]] logical [[operator]]s have left [[associativity]], which means that the left hand [[operand]] is evaluated before the right hand [[operand]]. == NOT Operator has right hand associativity The unary [[NOT]] operator, has right hand [associativity]: *This article requires an example. Please insert an example here. * == Conditional Branching * [[conditional branching]] Logical operators may be used within a program to create [[conditional branching]] structures. == Expressions Containing Multiple Operators == Confusion Between Logical and Bitwise Operators ---- [[Logical Operator Precedence]] [[Conditional Branching Using Logical Operators]] [[Logical Operators with Strings]] [[Logical Operator Efficiency]] [[Logic Optimization]] [[truth]]

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This change is a minor edit.

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