Hello, Im taking C in school, and i have a problem with my code, nothing happens at all when i run the program.
The task is:

A program is required that prompts the user for a number. The program will then print a series of asterisks to represent the number. If the user enters a number less than 1, the program stops. For example: 

Enter a number: 5

*****

Enter a number: 3

***

Enter a number: 9

*********

Enter a number: 0



i have decided to use while loop since its a pretest loop
here it is


#include<stdio.h>
main()
{
int num, i;

while(num>1)
{
printf("Enter a number:");
scanf("%d", &num);

while(i<=num)
{
printf("*");
i++;
}
}
}


any help would be apreciated!!!