How to Create an Alert in JavaScript?

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To create an alert in JavaScript, you can use the built-in alert() function. The alert() function displays a simple popup window with a message and an “OK” button that the user can click to dismiss the popup. Here’s an example code snippet that demonstrates how to create an alert in JavaScript:

alert("Hello, world!");

In this code, the alert() function takes a string as its argument. This string is displayed in the popup window that appears in the user’s browser. When the user clicks the “OK” button, the popup is dismissed and the JavaScript execution continues.

You can customize the message displayed in the alert by replacing “Hello, world!” with any other string of your choice. You can also use variables or expressions as the argument to the alert() function, as long as they evaluate to a string. For example:

const name = "John";
const age = 30;
alert(`My name is ${name} and I am ${age} years old.`);

This code uses a template literal to create a string that includes the values of the name and age variables. The resulting string is passed as an argument to the alert() function, which displays it in the alert popup.

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