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411 REFERENCE · Wikibooks

Common JavaScript Manual/Logic and Comparison operators

Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.

Logic operators There are three logical operators in JavaScript. It are "not","and","or". Let's see example. Operator Action || or && and ! not !true; // False !false; // True false || true; // True false && true;// False Comparison operators In parts of the previous file you've already seen some of these operators, and certainly understand their meaning but in anyway. There are 8 comparison operators in JavaScript. Operator Condition == Equal != Not equal === Equal value and type !== Not equal value or type > More < Less <= Less or equal >= More or equal And for example: 5 == 5; //True 5 === '5'; //False 5 != 3; //True 5 !== '3'; //True 5 > 3; //True 5 < 3; //False 5 <= 5; //True 5 >= 3; //True XOR Hack In JavaScript there is no operator XOR (also named Exclusive OR). But we can write function that use bitwise XOR and return booleadn XOR of two arguments. xor = function(a,b){ return Boolean(a ^ b) } And let's use it. xor(true,false); //True xor(true,true); //False xor(false,false); //False 75% Break, continue, labels Condition operator