Prime number is a number that is divisible by 1 and itself.
Example prime numbers are 2, 3, 5, 7, 11, 13, 17.
#include<stdio.h>
int main ()
{
int i, prime, up, low, n;
printf ("ENTER THE LOWER LIMIT : ");
scanf ("%d", &low);
printf ("ENTER THE UPPER LIMIT : ");
scanf ("%d", &up);
if(low>=2)
{
printf ("PRIME NUMBERS ARE : ");
for (n = low + 1; n < up; n++)
{
prime = 1;
for (i = 2; i < n; i++)
if (n % i == 0)
{
prime = 0;
break;
}
if (prime)
printf ("\t %d", n);
}
}
else
{
printf("Enter lower number must be greater than 1");
}
}
Output for Prime Numbers:
ENTER THE LOWER LIMIT : 2 ENTER THE UPPER LIMIT : 20 PRIME NUMBERS ARE : 3 5 7 11 13 17 19