syntax to declare variable function in c

a variable is the name of memory block,whose worth can be changed at anytime(runtime),we can pronounce a variable by utilizing following syntax:

[storage class ] data type variable name [=value];

 here [storage-class] and [=value] are optional

note: if storage class "static" initialization value must be provided

declaration ex.1

int age=10; 

if we do not storage class, variable default storage class will be auto . thus ex. 1 and 2 are same

declaration ex. 3: 

Declaration Ex. 2:

 int age=10;

If we do not specify storage class, variable’s default storage class will be an automatic (auto). Thus, declaration example 1 and 2 are same.

int age; 

This presentation is same as revelation ex. 1 and 2 without initial value, age will have either 0 or garbage dependent on the various compilers. 

some other examples: 

float percentage;//a float variable 

char gender;/a character variable 

/an array of characters, maxi. number of characters will be 100 

char name [100]; 

int marks [5];/an array of integer numbers to store mark of 5 subjects