PRIME NUMBER
#include<stdio.h>
int main()
{
int n,i;
printf("Enter the number: ");
scanf("%d",&n);
if(n==0||n==1)
{
printf("\n%d is not a prime number.\n",n);
return 1;
}
for(i=2;i<=n/2;i++)
{
if(n%i==0)
break;
}
if(i>n/2)
printf("\n%d is a prime number.\n",n);
else
printf("\n%d is not a prime number.\n",n);
return 1;
}
PRIME NUMBER RANGE
#include<stdio.h>
int main()
{
int n,i,a,b;
printf("Enter the lower limit of the range: ");
scanf("%d",&a);
printf("\nEnter the upper limit of the range: ");
scanf("%d",&b);
printf("\nPrime numbers are: \n\n");
for(n=a;n<=b;n++)
{
for(i=2;i<=n/2;i++)
{
if(n%i==0)
break;
}
if(i>n/2&&n>1)
printf("%d ",n);
}
return 1;
}