CODEWITHSUNDEEP
javascript
Muhammad Umer
Muhammad Umer

Reputation: 2308

In javascript what is the difference between operator '~' and '!'

I am out of theories, i don't know what else to say.

So far i always thought that both changed the value to false.

But, !, changes to true/false.

While, ~ , changes to negative number with 1 less so 2 become -3. Why and how.

Upvotes: 1

Views: 91

Answers (3)

Francisco Soto
Francisco Soto

Reputation: 10392

! is a boolean operator, it negates the result of a boolean expression.

~ on the other side is the bitwise not operator, which basically means, it flips all the bits in your operand, say, -1 which is represented by all 1 bits to 0 (which means 0 bits are set).

Upvotes: 0

Zeta
Zeta

Reputation: 105885

! is a logical operator, its result is either true or false, while ~ is a bitwise operator.

If you don't understand why ~number is -number - 1 have a look at two's complement.

I am out of theories, i don't know what else to say.

In this case have a look at the language's documentation.

Upvotes: 0

Praveen Kumar Purushothaman
Praveen Kumar Purushothaman

Reputation: 167182

~ (Bitwise NOT)

Performs the NOT operator on each bit. NOT a yields the inverted value (a.k.a. one’s complement) of a. The truth table for the NOT operation is:

a   NOT a
0   1
1   0

Example

9 = 00000000000000000000000000001001 (base 2)
               --------------------------------
~9 = 11111111111111111111111111110110 (base 2) = -10 (base 10)

Answer sourced from The tilde ~ operator in JavaScript.

Upvotes: 1

Related Questions