let vs var | Variables in JavaScript Part - 02 | JavaScript Tutorial Telugu #2 | javascript telugu
In this YouTube video I have explained about differences between let and var declaration in JavaScript. You will get to know about variable scope in JavaScript which are Global scope, local scope and block scope. I have explained differences with var and let by explaining four different concepts which you must see in the video. Finally I also explained type of questions can ask in JavaScript interviews on variable concepts.
----------------------------------------- Contents of this video ------------------------------------------------------------------
00:00 Variables - Part #01 recap
00:17 Topics introduction for Variables - Part #02
00:32 Source code clone from Github
00:42 let vs var - Four differences
00:49 let vs var : Difference #01 - Scope of variables (Global scope, Local scope and Block scope)
05:14 let vs var : Difference #02 - Global Object creation
08:23 let vs var : Difference #03 - Re-declaration
10:00 let vs var : Difference #04 - Temporal Death Zone (TDZ)
11:45 JavaScript Interview Questions on Variables
13:16 Conclusion
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