File write in c

#include <stdio.h>

//author: Anik Sarker
//date: Feb 20, 2020

int main()
{

    FILE *file; //file pointer

    int num;

    //file directory, and file mode
    file = fopen("multiplication table.txt","w");

    if(file == NULL) //check file exist or not
    {
        printf("File doesn't exist");
    }

    else
    {
        printf("File is opened\n");

        printf("Enter number who's multiplication table you want: ");
        scanf("%d", &num);
        fprintf(file, " Multiplaction table of %d   \n", num);
        fprintf(file, " -------------------------   \n", num);
        for(int i=1; i<=10; i++){
            fprintf(file,"       %d * %d = %d\n",num, i, num * i);
        }

        printf("File is written successfully\n");

        //file close
        fclose(file);
    }

    getch();
}