Scope, Visibility and Lifetime of variables

This video has a complete description of what scope, visibility and lifetime of a variable is. I have tried to explain all necessary things related to scope, visibility and lifetime of a variable.
*Scope - Area in the program where the variable is available.
*Visibility - Area in the program where the variable is accessible.
*Lifetime - Time period for which a variable is stored in some memory space(main memory or register).
Types of Scope:
1. Program Scope - Variable is available throughout the program.
2. File Scope - Variable is available throughout the file.
3. Block scope - Variable is available throughout the block in which it is declared.
4. Function Scope - Variable is available throughout the function in which it is declared.(usually for labels)
5. Prototype Scope - Variables passes as parameters to a function have this type of scope.
Visibility is a subset of Scope.
A variable may be available throughout the program, but it may not be accessible at some parts.
Types of lifetime:
1. Static lifetime - All static variables have static lifetime. They are stored in the memory till the program terminates.
2. Automatic Lifetime - All auto variables have automatic lifetime. They are stored in the memory till the block terminates.
3. Dynamic Lifetime - All variables which are created dynamically using malloc/new and deleted explicitly using free/delete have Dynamic Lifetime.
After having done with this video, I would recommend you all to watch my video on Storage Classes. Link to that video is given below.
• Storage Classes in C -...
Thanks.
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[@sejalbabar3562]

I was reading regarding static variables and didn't knew what was scope and visibility ur video helped a lot!!!

[@ShahidNihal]

Glad it helped!

[@abhijeetraj7952]

Crystal Clear 🔥 Thank You So much. Thumbs up👍 👏

[@ShahidNihal]

Thanks for your positive response!

[@smit_XD]

Crystal Clear 🔥

[@viragjain720]

Beautifully taught!

[@מיכל-ס1ר]

Thank you! Very clearly explained!

[@ShahidNihal]

You are welcome!

[@hudaadibahuda475]

Thank you sir..... valuable information 😊👍

[@ShahidNihal]

Welcome 👍

[@harshjoshi6257]

Well done 👏👍 Invest a little more ,you will definitely get subscribers

[@ShahidNihal]

Thanks a lot! I guess I'll start shooting videos again. You actually gave me hope. I lost hope thinking that I wouldn't get any subscribers and hence stopped shooting videos. Now, I'll definitely find time for shooting videos. Ty

[@dhiraj.govindvira]

Ha harsh

[@meetpatel3974]

Ekdam sachi harsh.....

[@dcurre]

What if i do: int x = 1; f (int x){ x = x+1; } f(x); print(x); What's the value of the x (dynamic & static)? Does it gets modified by x+1 or keeps his original value? Good video tho ^^

[@ShahidNihal]

This would print x=1.

[@vrajpatel1877]

Thank you very very much😊🤩

[@ShahidNihal]

Most welcome!

[@OsoGP]

great explanation thank you

[@ShahidNihal]

Thanks!

[@praneethsaitunuguntla7751]

excellent sir! Thank you ...

[@ShahidNihal]

Most welcome!

[@tejashwinireddypadigela7496]

Excellent Sir

[@ShahidNihal]

Thanks a lot!

[@pankajjatav6448]

Available but not accessible then what for it is available if it is not accessible?

[@aleemullakhan8514]

Good explanation!

[@ShahidNihal]

+Aleemulla Khan Thanks

[@sejalbabar3562]

Pls makes videos this topic video wasn't available anywhere

[@ShahidNihal]

Will upload on weekly basis

[@victortanpengshen6454]

Got anyone can tell me what is the lifetime of variable in R programming?

[@Frishta-e-Flak]

What is R programing

[@soumyas7472]

Hi..Is this common for java programming language also?