# JavaScript logical AND (&&) symbol explained

JavaScript logical AND operator is marked with two ampersand symbols (`&&`).

The operator is used to perform logical conjunction of the values you added as its operands.

The logical AND operator returns `true` only when all operand values evaluate as `true`.

Consider the following example code:

``````const resultOne = 3 > 0 && 2 > 0;

console.log(resultOne); // true

const resultTwo = 1 < 0 && 10 > 2;

console.log(resultTwo); // false
``````

The logical AND operator evaluates the values placed as its operand from left to right.

It immediately returns the first `falsy` value it encounters, or `truthy` when all values evaluate to `true`.

In the above example, The numbers `3` and `2` are both greater than `0`, so the expression `3 > 0` and `2 > 0` evaluates to `true`.

But in the second example, the number `1` is not less than `0`, so `1 < 0` evaluates to `false`. The AND operator stops any further evaluation and returns the value `false` to you.

The AND operator works with any kind of expression, meaning you can use a single value as shown below:

``````true && false; // false
true && true; // true

1 && 0; // 0
1 && null; // null
1 && undefined; // undefined
``````

You can also use the AND operator as many times as you need:

``````true && true && true && true; // true
true && true && true && false; // false
``````

The AND operator will return any truthy value returned by the last operand.

If you put a `string` or `number` as the value of the last operand, it will be returned as shown below:

``````true && "A" && true; // true
true && true && "A"; // "A"
true && true && 2000; // 2000

// falsy value will be returned first
true && false && "A"; // false
true && 0 && 2000; // 0
``````

And that’s how the logical AND (`&&`) operator works in JavaScript. 😉

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