The difference between && and || is that the && operator returns true when both operands are true, whereas the || operator returns false when both operands are false.
The following truth table shows the difference between && and ||:
| x | y | x && y | x || y |
|---|---|---|---|
| true | true | true | true |
| true | false | false | true |
| false | true | false | true |
| false | false | false | false |
Note: && is logical AND operator. || is logical OR operator.
Another difference between && and || is that the && operator has higher precedence than the || operator.
let x = true,
y = false,
z = true;
console.log(x || y && z); //true
First, y && z is evaluated, and it gave false. After that, x || false is computed, resulting in true. So, the overall value of the expression is true.
