You asked: How do you console a variable in JavaScript?

How do you console a variable?

log() with Examples. The console. log() is a function in JavaScript which is used to print any kind of variables defined before in it or to just print any message that needs to be displayed to the user.

How do you reference a variable in JavaScript?

In JavaScript, it’s just NOT possible to have a reference from one variable to another variable. And, only compound values (Object, Array) can be assigned by reference. Bottom line: The typeof value assigned to a variable decides whether the value is stored with assign-by-value or assign-by-reference.

How do I use JavaScript console?

In javascript, the console is an object which provides access to the browser debugging console. We can open a console in web browser by using: Ctrl + Shift + K for windows and Command + Option + K for Mac.

How do you pass a variable in console log?

console. log takes multiple arguments, so just use: If name is an object or an array then using multiple arguments is better than concatenation. If you concatenate an object or array into a string you simply log the type rather than the content of the variable.

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Should I use console log?

Yes. console. log will throw an exception in browsers that don’t have support for it (console object will not be found). Generally yes, its not a great idea to expose log messages in your production code.

When should you use console log?

The JavaScript console log function is mainly used for code debugging as it makes the JavaScript print the output to the console.

What are the types of variables in JavaScript?


  • Numbers: 5, 6.5, 7 etc.
  • String: “Hello GeeksforGeeks” etc.
  • Boolean: Represent a logical entity and can have two values: true or false.
  • Null: This type has only one value : null.
  • Undefined: A variable that has not been assigned a value is undefined.

What is a variable in JavaScript?

Variable means anything that can vary. In JavaScript, a variable stores the data value that can be changed later on. Use the reserved keyword var to declare a variable in JavaScript.

What is difference between VAR and let in JavaScript?

var and let are both used for variable declaration in javascript but the difference between them is that var is function scoped and let is block scoped. It can be said that a variable declared with var is defined throughout the program as compared to let.

What is a console in JavaScript?

The JavaScript console is a command line interface in your browser that can execute snippets of code. When that code snippet is designed to interact with the webpage you are currently on, result can happen that might not have been possible otherwise.

Where is the JavaScript console?

Press Command+Option+J (Mac) or Control+Shift+J (Windows, Linux, Chrome OS) to open the Console, right here on this very page.

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