"!==" what does it mean?

Question

so I am having a hard time what this means:

return ( number % 2 !== 0);

mostly with the" !==".
does it function the same way as "=" and "=="?
so for example:

(number % 2 !== 0)

console.log(2);

so would it be ( 2 % 2 !==0) the output should be 0.
I am a bit confused, please help! thank you.

Answer 1

In JavaScript, the "!=="" operator is used for strict inequality comparison, which means that it compares two values and returns a Boolean value based on whether they are not equal in value or data type.

In the context of the code you provided, "(number % 2 !== 0)" means that it checks whether the remainder of the division of "number" by 2 is not equal to zero. If the remainder is not equal to zero, then it returns true; otherwise, it returns false.

Answer 2

https://stackoverflow.com/questions/42517721/difference-between-and#:~:text=on%20this%20post.-,!%3D,being%20compared%20to%20each%20other.

Answer 3

In python it is similar
Operator Meaning Example
==Is Equal To 3
== 5 gives us False
!=Not Equal To 3
!= 5 gives us True

Answer 4

To understand what !== means you first need to know what === is.

In javascript if you use == in an if condition to compare between "1" and 1 then it will return true.
Even though they are different value types they still are equal.

But === (Strict equality) not only checks if two values are equal but also if they are the SAME type.
For example if you compare 1 and "1" with === then it will return false but if you compare 1 and 1 or "1" and "1" with === then it will return true

!== is exactly like === but the catch is... if it becomes true then it returns false and if it is false then it returns true.
So 1 and 1 compared with !== will return false while 1 and 2 return true... same thing when compared with "1" and 1.

Answer 5

Eren It is used for inequality comparison ....