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Logical operators. Logical operators evaluate Boolean expressions and determine whether the entire expression is true or false based on the operator used. You ... Jun 5, 2022 ... OR "||" finds the first truthy value · Evaluates operands from left to right. · For each operand, converts it to boolean. If the result is true ... PHP's boolean operators always return a boolean value as opposed to other languages that return the value of the last evaluated expression. Your one-stop shop for IT training courseware. Training organizations all over the world rely on Logical Operations for the highest quality training courseware. Sep 29, 2021 ... 1. When P is true (it is raining) and Q is true (Daisy is playing golf). 2. When P is true (it is raining) and Q is false (Daisy is not playing ... Nov 9, 2009 ... I prefer to use not instead of ! because it's a lot more readable: if (not condition()) { } versus if (!condition()) { } The ! kind of gets lost in there. Description. The Logical Operator block performs the specified logical operation on its inputs. An input value is true ( 1 ) if it is nonzero and false ( 0 ) if ... Oct 18, 2017 ... I am trying to use the query builder to select numerous features in a layer. I saw a question on here that suggests using the AND operator to do this. Arithmetic Operators · Boolean Operators · Bitwise Operators · Updating operators · Vectorized "dot" operators · Numeric Comparisons · Operator Precedence and ... Logical operators; Assignment operators; Function operators; String Operators; Literal constructors; Miscellaneous operators. Also see: Operator precedence ...