Print n'th prime number program in c language
#include<stdio.h>
int main()
{
int n, i = 3, count, c;
printf("Enter the number of
prime numbers required\n");
scanf("%d",&n);
if ( n >= 1 )
{
printf("First %d prime
numbers are :\n",n);
printf("2\n");
}
for ( count = 2 ; count <= n ; )
{
for ( c = 2 ; c <= i - 1 ; c++ )
{
if ( i%c == 0 )
break;
}
if ( c == i )
{
printf("%d\n",i);
count++;
}
i++;
}
return 0;
}
C program for prime number or not
#include<stdio.h>
main()
{
int n, c = 2;
printf("Enter a number to check if it is prime\n");
scanf("%d",&n);
for ( c = 2 ; c <= n - 1 ; c++ )
{
if ( n%c == 0 )
{
printf("%d is not prime.\n", n);
break;
}
}
if ( c == n )
printf("%d is prime.\n", n);
return 0;
}
C program for prime number using function
#include<stdio.h>
int check_prime(int);
main()
{
int n, result;
printf("Enter an integer to check whether it is prime or not.\n");
scanf("%d",&n);
result = check_prime(n);
if ( result == 1 )
printf("%d is prime.\n", n);
else
printf("%d is not prime.\n", n);
return 0;
}
int check_prime(int a)
{
int c;
for ( c = 2 ; c <= a - 1 ; c++ )
{
if ( a%c == 0 )
return 0;
}
if ( c == a )
return 1;
}
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