Variables in C

 Variables :-

                A variable is a name given to a storage area that holds a particular value. In C programming each variable specify the types which specify the size of that variable(like int, float, char ...etc.) and by using these variables u can perform various operations.

Variables in c programming

Here are few examples of variables -

int var;

- Here var is a variable of type int which can store an integer value.

float _myVar = 2.00;

- _myVar is a variables of type float which stores a floating points values(i.e decimal values). 

char c;

- Here cis a variable of type character which can store an character value.

Rules of naming variables :-

• Variables names should only contain only letters (Uppercase and Lowercase)and numbers and a special character underscore(_).
• The first letter of the variable name should start with a letter or an underscore (you cannot start with a number).
• variables cannot contain any special characters other then numbers, letters and underscore.
• Variables in C programming iscase sensitive i.e Uppercase and lowercase characters are treated  differently.

Few Examples of valid variables:-

int  _var12;

char _character;

float n1_num;

Few Examples of invalid variables:-

int 1var1;

    -This is invalid because the first character here is a number.

char ch$;

    -This is invalid because the last character here is dollar symbol which cannot be used.

float _n1#

    -Again this would generate an error as we cannot use ampersand.

Assigning value to a variable:-

Variable in c

The variable act like a bucket to hold or to store values of particular data types like int, float ...etc.

We can assign values to a variable by using an assignment operator, when we use an assignment operator it will assign the value on the left side of it to the variable.

For example:-

• int var = 99;

                This statement will assign 99 which is an integer to the variable var.

• flpat a = 99.99;
                This statement will assign 99.99 which is an floating pont value to the variable a.