Prime number

#include <stdio.h>
#include <math.h>

int main()
{
    int number, i, n = 0, srt;
    printf("Number: ");
    scanf("%d", &number);
    srt = (int)sqrt(number) + 1; // корен квадратен
    for (i = 2; i <= srt; i++)
    {
        if (number % i == 0)
        {
            n = 1;
            break;
        }
    }

    if (n == 0)
    {
        printf("Number %d is prime.", number);
    }
    else
    {
        printf("Number %d is not prime.", number);
    }

    return 0;
}