JavaScript Variables, Data Types & Objects | Sigma Web Development Course - Tutorial #55

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Timestamps 🕰️
00:00 Introduction
00:31 Sigma Web Development Course Intro
00:41 Download Notes
02:03 JavaScript variables
07:30 Understanding const in JavaScript
07:50 var vs let in JavaScript
12:10 Primitive Data Types
15:19 The type of null
16:15 Objects
19:18 Conclusion
19:57 Sigma Outro

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[m.arshad]

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[sanket]

This course is just looking like a wow...! ❤🎉00:01 JavaScript variables hold data and have different data types.
02:03 JavaScript variables are containers that store values of various data types.
04:00 Introduction to JavaScript variables, data types, and objects
05:55 JavaScript variable names have rules and are case sensitive
07:50 Understanding const in JavaScript
09:40 JavaScript variables have block scope with let and global scope with var
11:29 JavaScript Variables, Data Types & Objects
13:39 Understanding const and let variable declarations in JavaScript
15:49 The type of null in JavaScript is object.
17:25 JavaScript objects can be modified by adding or changing key-value pairs
19:08 Variables in JavaScript and rules to follow
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[s.pavankumar]

The reason why the type of null is an object in JavaScript is a historical decision that has been maintained for compatibility reasons. When JavaScript was first created, there was no separate type for null, and it was simply treated as a special case of the object type. This was because null was often used to represent an empty reference to an object, and it made sense to treat it as such from a programming perspective.

Over time, JavaScript has evolved to include a separate type for null, but the original behavior of returning object for typeof null has been preserved to avoid breaking existing code. This is a common practice in software development, as it is often more important to maintain compatibility with existing code than to make changes that could break it.

As a result, the type of null is still considered to be an object in JavaScript, even though it is technically a separate type. This can be a bit confusing for some developers, but it is important to understand the historical context behind this behavior.

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[ur_zaz]

2:30 variables
7:30 var vs let
12:10 primitive data types
16:16 object

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Tutorial 55 done.✅
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