Why should anyone use " ! " ?

Question

who needs the wrong answer ? lol

Answer 1

Armann Its required in below case:

suppose you need to check whether log in is done successfully or not .. You have created a bool variable if error is occurred (bool IsFoundErrInLogin) while trying to check for login... At the end of this logical block, few steps are required to perform after login...so, you will do following check:

if(! IsFoundErrInLogin==true)
{
// your code for steps after login is okay
}

this is a siMole case and can be more complex scenes like this

Answer 2

if(1 != 2){
true();
}else{
false();
}

!= here "!" used with "=" 2 values, if the value is different ,then the true(); function will run. "!=" .
!=👉if no equal

Answer 3

Ketan Lalcheta wow , exactly what I needed to know. thanks!

Answer 4

pleasure to know it helped .. Armann