What is c?

- C is a programming language developed at AT & T's Bell Laboratories of USA in 1972 by Dennis Ritchie.

- Any programming language can be divided into two categories

 * Problem oriented (High Level Language)

* Machine oriented (Low Level Language )

- But  C is considered as Middle Level Language 

Write a program to input the radius value from the keyboard and calculate the area of circle and print the result in both floating and exponential notation.
#include<stdio.h>
#include<conio.h>
void main()
{
int r;
float area;
clrscr();
printf("input the radius of circle");
scanf("%d",&r);
area=3.14*r*r;
printf("%f",area);
getch();
}
output
input the radius of circle7
153.86001

Write a program to demonstrate arithmetic operators.(+,-,*,/,%)
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b,c,d,e,f;
float g;
clrscr();
printf("input the a");
scanf("%d",&a);
printf("input the b");
scanf("%d",&b);
c=a+b;
d=a-b;
e=a*b;
f=a\b;
g=a%b;
printf("\n=%d",c);
printf("\n=%d",d);
printf("\n=%d",e);
printf("\n=%f",f);
printf("\n=%f",g);
getch();
} 

Print the following formats.

****

***

**

*

#include<stdio.h>

#include<conio.h>

void main()

{

int i,j;

clrscr();

for(i=4;i>1;i--)

{

for(j=;j<=i;j++)

printf("*");

printf("\n");

}

getch();

}

OUTPUT

****

***

**

*

Print the following formates.

                        1

                        12

                        123

                        1234

   #include<stdio.h>

  #include<conio.h>

 void main()

{

int i,j,num;

clrscr();

printf("input the number");

scanf("%d",&num);

for(i=1;<=num;i++)

{

for(j=1;j<=i-1;j++)

{

printf("%d",j);

}

printf("\n");

}

getch();

}

write a program to print "welcome to c programming" with different formats using escape sequences.

#include<stdio.h>

#include<conio.h>

Void main()

{

Printf("\" welcome to c programming \"" );

getch() ;

} 

print sample strings like '' Hellow World''.

#include<stdio.h>

#include<conio.h>

Void main()

{

Printf(''Hellow World'' ) ;

getch() ;

} 

Why do you join BCA?

ans:- (LIFE) ...............LEARN............MONEY.........BY PRIVATE JOB.......BY GOVERNMENT JOB.......BUSINESS.

Because no of employee has been increase in the field of government job but, croud of people are use in government job so i can't satisfy own family.I can satisfy family and freedom of life i.e be can join BCA.