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This article mainly explains "JavaScript variable instance analysis", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let Xiaobian take you to learn "JavaScript variable instance analysis"!

JavaScript variables can also hold other data types, such as text values (name="BillGates").

In JavaScript, a piece of text like "Bill Gates" is called a string.

JavaScript variables come in many types, but for now, we'll focus only on numbers and strings.

When you assign a text value to a variable, you should enclose the value in double or single quotes.

Do not use quotation marks when you assign a numeric value to a variable. If you enclose a numeric value in quotation marks, the value is treated as text.

examples

varpi=3.14;

//If you are familiar with ES6, pi can use the const keyword to represent a constant

//constpi=3.14;

varperson="JohnDoe";

varanswer='YesIam! ';

declaring (creating) JavaScript variables

Creating variables in JavaScript is often referred to as "declaring" variables.

We use the var keyword to declare variables:

varcarname;

After a variable is declared, the variable is empty (it has no value).

To assign values to variables, use the equal sign:

carname="Volvo";

However, you can also assign values to variables when declaring them:

varcarname="Volvo";

In the following example, we create a variable named carname, assign it the value "Volvo", and put it in the HTML paragraph id="demo":

examples

varcarname="Volvo";

document.getElementById("demo")[xss_clean]=carname;

At this point, I believe that everyone has a deeper understanding of "JavaScript variable instance analysis", so let's actually operate it! Here is the website, more related content can enter the relevant channels for inquiry, pay attention to us, continue to learn!

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