// The following code is meant to print the sum of the first n natural numbers.
// However, it has some issues that you need to fix. Good luck!

#include <stdio.h>

int main(void) {
    int number;
    printf("Enter a number: ");
    int return_value = scanf("%d", &number);
    if (return_value != 1) {
        printf("You have entered an invalid number!\n");
    }

    sum;
    i = 1;
    while (i <= number) {
        sum = sum + 1;
    }

    printf("The sum of the first %d natural numbers is: %d\n", number, sum);

    return 0;
}