lucproblem008.c

Problem Statement

lucproblem008.c

Write a problem to print all the prime numbers from 1 to 300.

Source Code

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

#define LIMIT 300

int main()
{
    printf("Prime numbers from 1 to 300 :  2"); // as 2 is the only even prime number
    for (int i = 3; i <= LIMIT; i += 2)  // skipping all other even number
    {
        int n = (int)sqrt(i);
        bool prime = true;

        for (int j = 3; j <= n; j += 2)
        // an odd number is only devisable by another odd number.
        // so, skipping even number.
        {
            if (i % j == 0)
            {
                prime = false;
                break;
            }
        }
        if (prime)
        {
            printf("  %d", i);
        }
    }
    return 0;
}

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● Author - Amit Dutta · Updated - 12 Dec 2025