Ajay Yadav ๐ŸŽฏ Profile picture
Mar 1 โ€ข 7 tweets โ€ข 2 min read
๐Ÿ’› Day 1๏ธโƒฃ / 3๏ธโƒฃ0๏ธโƒฃ days of basics in JavaScript series!

โ†’ What are values and their type?

โ†’ What is the use of value?

โ†’ How to invoke or call value?

โ†’ What is a variable?

#javascript30

Let me explain!๐Ÿ‘‡๐Ÿงต Image
๐Ÿ“Œ What is value?

โ†’ A value is a fixed object.

โ†’ Or, a value is a definite item or entity.

โ†’ In the context of programming, A values can be a number, string, double, function, etc

โ›” Note: javascript function also produces a value!
๐Ÿ“Œ What is the use of value?

โ†’ Values are used to perform calculations.

โ†’ Suppose, 10 & 20 are values, you can add, subtract, them using an operator!

๐Ÿ’š More in the upcoming thread!
๐Ÿ“Œ How to invoke or call value?

โ†’ You can invoke or call your values with their name, which is a variable.
๐Ÿ“Œ What is a variable?

โ†’ Variables are "bucket" for storing "water"

โ—ฉ Buckets => Memory

โ—ฉ Water => Data or value
โ†’ Or, variables are container/memory for storing data values.

โ†’ Or, A value stored in a variable.

โ†’ Or, A variable can be stored any type of data, for example, number, string, etc.

โ†’ Or, a variable contains a value.

โ†’ Or, a variable is the name of the memory location.
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Let me explain!๐Ÿงต๐Ÿ‘‡ Image
๐Ÿ“Œ What is DOM?

โ–บ DOM stands for Document Object Model.

โ–บ DOM is not part of JavaScript, it's an interface that allows programming language to change or remove the HTML elements.

โ–บ It is used to make the website interactive from the client-side.
โ–บ DOM is used to manipulate, style, or content of HTML elements.

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โ–บ And the <HTML> is the child of the "document" node or object. Image
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๐Ÿ’› Day 2๏ธโƒฃ6๏ธโƒฃ / 3๏ธโƒฃ0๏ธโƒฃ days of basics in JavaScript series!

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๐Ÿงตโ‡ฉ
๐Ÿ“Œ What is an array?

โ†’ It is a special variable that can be store more than one value.

โ†’ If you have multiple data items then you can use an array for storing those items.

โ†’ It can hold many values in a single variable.
โ†’ Or, storing a collection of multiple items in a single variable.

โ†’ Js array can contain mixed types of data or items, like string, decimal, float, boolean, etc.
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Let me explain!๐Ÿงตโ‡ฉ
๐Ÿ“Œ How many types of functions are in JavaScript?

โ†’ There are 3 types of function is javaScript

1๏ธโƒฃ Function declaration/statement
2๏ธโƒฃ Function expression
3๏ธโƒฃ Arrow function
1๏ธโƒฃ Function declaration/statement

2๏ธโƒฃ Function expression

โ›” Learn it from this thread!๐Ÿ‘€๐Ÿ‘‡

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Let me explain!๐Ÿงตโ‡ฉ Image
๐Ÿ“Œ What is an arrow function?

โ†’ This is also similar to function declaration or function expression.

โ†’ Arrow function was introduced in ES6(2015).

โ†’ It allows us to define a function with an arrow (=>) symbol.
๐Ÿ“Œ What is the syntax of the arrow function?

โ†’ This is the simple syntax of the arrow function

๐—ฃ๐—ฎ๐—ฟ๐—ฎ๐—บ๐—ฒ๐˜๐—ฒ๐—ฟ => ๐—˜๐˜…๐—ฝ๐—ฟ๐—ฒ๐˜€๐˜€๐—ถ๐—ผ๐—ป

๐Ÿ‘€Here:

- "square" is the name of the function

- "a" is the parameter of the function

- "a * a" is the function expression Image
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