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Variables

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A variable is a “named storage” for data. We can use variables to store goodies, visitors, and other data. To create a variable in JavaScript, use the let keyword. The statement below creates (in other words: declares) a variable with the name “message”: Now, we can put some data into it by using the assignment operator =: The string is now saved into the memory area associated with the variable. We can access it using the variable name: To be concise, we can combine the variable declaration and assignment into a single line: We can also declare multiple variables in one line: That might seem shorter, but we don’t recommend it. For the sake of better readability, please use a single line per variable. The multiline variant is a bit longer, but easier to read: Some people also define multiple variables in this multiline style: …Or even in the “comma-first” style: Technically, all these variants do the same thing. So, it’s a matter of personal taste and aesthetics. In older scripts, you

Most of the time, a JavaScript application needs to work with information. Here are two examples: An online shop – the information might include goods being sold and a shopping cart. A chat application – the information might include users, messages, and much more. Variables are used to store this information. A variable A variable is a “named storage” for data. We can use variables to store goodies, visitors, and other data. To create a variable in JavaScript, use the let keyword. The statement below creates (in other words: declares ) a variable with the name “message”: let message; Now, we

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