Common JavaScript Manual/Logic and Comparison operators

Logic operatorsEdit

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 operatorsEdit

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 HackEdit

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


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