1. Basic of C Language

What is a programming language?

A programming language is a type of written language that tells computers what to do.

Ex: C, C++, java, python.

What is c programming?

C is a high- level language and general-purpose programming language that is ideal for developing portable applications.

Data type:

Variables:

A variable is contained which stores values.

int a = 3.

Constant:

It is a value of a variable that can't be changed in the program.

Ex: 10,20, a, etc.

Keywords:

Keywords are the parts of syntax, and they can't be used as an identifier.

For ex: int a= 10

Int is a keyword.

There are 32 keywords in c.

auto break 

case char

const continue

default double

enum extern

float for

goto if

int long

register short 

signed size of

static struct

switch type of

union unsigned

void volatile

while                                                                        return

else

TYPES OF C CONSTANT:

There are four  types of constant

 

1) Integer constant : This data type is used to define an integer number

(...-3,-2,-1 ,0,1,2,3…)

A single integer occupied 2 byte

%d is printing integer value

2) Real constant : There are two forms

      Float: It is a single precision ,occupies 4 bytes 

       For ex 32.75

      %f is printing float

       

      Double: it is a double precision, occupies 8 bytes

     For ex 32.7543

     %lf for printing double

3) Char constant :It is used to define character, occupies 1 bytes

   For ex - ‘A’

   %c for printing  character value

4) String :Set of character 

            For ex - sanu.

            %s for printing string