Semicolon in JavaScript

In JavaScript, a semicolon (;) is used to terminate a statement. It is optional in most cases, but it is recommended to use it to avoid unexpected behavior.

Here are some examples of using semicolons in JavaScript:

• Terminate a statement:

let x = 5;
console.log(x);

• Separate multiple statements on the same line:

let x = 5; console.log(x);

• Use it with control structures like if, for, while, etc.:

if (x > 0) {
  console.log("x is positive");
}

• Use it with function expressions and declarations:

// Function expression
const add = function(a, b) {
  return a + b;
};

// Function declaration
function multiply(a, b) {
  return a * b;
}

• Use it with object literals:

const person = {
  name: "John",
  age: 30,
  sayHello: function() {
    console.log("Hello");
  }
};

In general, it is recommended to use semicolons consistently throughout your code to avoid any unexpected behavior. However, some developers prefer to omit semicolons and rely on automatic semicolon insertion by the JavaScript engine.