To print a prime numbers up to 1 to n

#include<stdio.h>

#include<conio.h> void main()

{

int  n,i,fact,j; clrscr();

printf("enter the number:"); scanf("%d",&n); for(i=1;i<=n;i++)

{

fact=0;

//THIS LOOP WILL CHECK A NO TO BE PRIME NO. OR NOT. for(j=1;j<=i;j++)

{

if(i%j==0)

fact++;

}

if(fact==2) printf("\n %d",i);

}

getch( );

}

Output:

Enter the number : 5

1     3  5

Enter the number : 10

 2 3 5 7

Enter the number : 12

2     3  5  7 11

Conclusion : The program is error free

VIVA QUESTIONS:

1) What is prime number ?

Ans: Prime number is a number which is exactly divisible by one and itself only

2)What is an algorithm?

Ans : A step by step procedure is called algorithm

3)What is flow chart?

Ans: A pictorial representation an algorithm is called a flow chart

4)What is program?

Ans : A collection of statements is called program

Algorithm

Flow chart

c programs