The role of logical operators in js

The role of logical operators in JavaScript

Logical operators in JavaScript are used to perform Boolean operations on Boolean values ​​to produce a new Boolean value. They are mainly used to control processes and evaluate conditions.

Commonly used logical operators are:

Boolean AND (AND)

• Symbol: &&
• Function: When both operands are true, the result is true; otherwise, the result is false.

<code class="js">const isSunny = true;
const isWarm = true;

if (isSunny && isWarm) {
  console.log("Go for a walk!");
}</code>

Boolean OR (OR)

• Symbol: ||
• Function: When two When at least one of the operands is true, the result is true; otherwise, the result is false.

<code class="js">const isHungry = true;
const isThirsty = false;

if (isHungry || isThirsty) {
  console.log("Get something to eat or drink!");
}</code>

Boolean NOT (NOT)

• Symbol: !
• Function: Convert a Boolean The value is inverted, that is, true becomes false and false becomes true.

<code class="js">const is raining = false;

if (!is raining) {
  console.log("It's not raining!");
}</code>

The priority of logical operators

The priority of logical operators from high to low is:

1. Boolean NOT (NOT)
2. Boolean AND (AND)
3. Boolean OR (OR)

When you need to change the priority, you can use parentheses to enforce it.

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