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My dear reader and visitors ,today we will learn more about what is Variable in C language and how to we use in program. What is variable initialization in C with example?  What is variable declaration give one example of it?

What is Variable:-

A variable is a name which can hold any value in memory or variable is a named location in a memory where a program can manipulate the data.

Naming rules of Variable:-

1. A variable name should be meaningful .Example- 

int num1;

float employ_name; 

2. A variable may have any length. Example-

int your_name;

int integer_value;

float any_floating_numbers;

2.A variable does not support space character. Example-

int num  1;

floar num  2;

4. A variable name can't be start with numeric value. Example-

int 1num;

float 76num;

5.A variable can support underscore (_) operator. Example-

int employee_salary;

Note:-  We can define more than one variable in single statement but we have to use comma seperator (;).

What is variable declaration give one example of it?

Variable  Declaration:-

To create the name of variable is called variable declaration.

Syntax:-   datatype  variable;

For example-

    int num;

here int is a datatype and num is a variable.

What is variable initialization in C with example?

Variable Initialization:-

To assign value in a variable is called variable initialization.

There are two types of variable initialization--

• Compile Time Initialization or Static Initialization.
• Run Time Initialization or Dynamic Initialization.

Compile Time Initialization or Static Initialization

When we assign value at program design time is called compile time initialization. It has fixed value. It can't be change at run time.

For example:-

#include<stdio.h>

#include<conio.h>

void main()

{

   clrscr();

   int num=200;

   printf("%d",the value of num);

   getch();

}

Run Time Initialization or Dynamic Initialization

To assign value at run time from user is called run time initialization. For this purpose we use scanf() function in C language.For example-

#include<stdio.h>

#include<conio.h>

void main()

{

   clrscr();

   int num;

   scanf("%d",&num);

   printf("the value of num=%d,num);

   getch();

}

Types of Variable:-

• Local Variable 
• Global Variable

Local Variable:-

A local variable is a variable which is declared inside a function or block is called local variables.We can be used only by statements that are inside that function or block of code.

For example:-

#include<stdio.h>

#include<conio.h>

void main()

{

   clrscr();

   /* Local variable Declaration */

   int num;

   scanf("%d",&num);

   printf("the value of num=%d,num);

   getch();

}

Global Variable:-

A Global variables are the types of variable which are defined outside a function, usually on top of the program. We can accessed the global variable anywhere in the program or inside any of the functions defined for the program.For Example :-

#include<stdio.h>

#include<conio.h>

   /* Global variable Declaration */

int num;

void main()

{

   clrscr();

   scanf("%d",&num);

   printf("the value of num=%d,num);

   getch();

}

Learn more about

 What is Variable in C language?

 What is Data Type in C language?

What is format specifier?

What is printf() and scanf() function in c language?

What is difference between declaration and initialisation of variable?

 What is type casting

 How many types of casting are there in Java?

What is the difference between explicit and implicit casting in Java?

 What are implicit and explicit casting explain with the help of example Java?

What is tokens in C language?

I hope you know what is Variable C language ? / What is variable initialization in C with example? What is variable declaration give one example of it? Must have understood very well. If you have any doubts in this blog, then you can write for it in the below comment box. There is one more request from you that you must tell your friends about this blog and share it on as many social media accounts as Facebook, What's app or others.