Write a C program to generate all the prime numbers between 1 and n

/* Write a C program to generate all the prime numbers between 1 and n, where n is a value supplied by the user. */


#include <stdio.h>

void main()
{
int no,counter,counter1,check;
clrscr();
printf(“<———————–PRIME NO. SERIES————————>”);
printf(“\n\n\n\t\t\tINPUT THE VALUE OF N: “);
scanf(“%d”,&no);
printf(“\n\nTHE PRIME NO. SERIES B/W 1 TO %d : \n\n”,no);

for(counter = 1; counter <= no; counter++)
{
check = 0;
//THIS LOOP WILL CHECK A NO TO BE PRIME NO. OR NOT.

for(counter1 = counter-1; counter1 > 1 ; counter1–)
if(counter%counter1 == 0)
{
check++;        // INCREMENT CHECK IF NO. IS NOT A PRIME NO.
break;
}
if(check == 0)
printf(“%d\t”,counter);
}
getch();
}

Posted in: C Programs