Putting an exclamation mark ! before a Boolean variable gives the opposite value. The ! is called a “not” operator when used this way.

The result of a comparison is a Boolean value, we can save it to a variable const bool = (1 < 2);

Then we can check if bool is true or false by using console.log

console.log(bool); - this will return true console.log(!bool); - “not true”, therefore returns false console.log(bool); - The original value isn’t affected, still returns true

We can also assign a Boolean value straight to a variable with the keywords true and false:

const aLie = false;
let previousStatement = true;
Challenge:

Try inverting a true or false value and print the result to the console

Answer const human = true;
console.log(!human) // should return false
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