Question

Compare and contrast static variable declarations versus dynamic variable declarations. State as many pros and cons as you can.

Answer 1

Hi,

Let's see the basic definition and syntax of both variable types first.

Static Variable:

Static values are basically holding its values even after it is in out of scope. So, it will not initialize in the new scope due to its previous value. SO the value is unchanged.

static data_type variable_name = variable_value;

Dynamic Variable:

Dynamic variable can change its value during the run time. It will get the value from the user at any point of time and can be changed again.

data_type variable_name;

Advantages of Static Variable:

- It improves the code performance
- It uses Heap memory.
- It is changeless hence no additional memory is required.

Disadvantages of Static Variable:

- It will always consume the memory whether used or not.
- You cannot have control while creating and destructing the static variable.
- Scope is limited.
- Serialization won't work here.

Advantages of Dynamic Variable:

- It can be used across the program in all the scopes.
- Maintenance is very easy.
- Declaration of variable is done only once outside the module and then it can be changed in the functions.

Disadvantages of Dynamic Variable:

- Code debugging is hard.
- It might change the value in other place than it was actually intended to use.
- Value is unpredictable in some point of time.

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Happy Learning!