Thread: Limiting input to only positive integers?

I'm writing the Mario half pyramid and I'm using user input to create a pyramid of the height (user input). However, I forgot to limit it to only positive integers (1-23) and not non integers or just pressing "enter". Any ideas on how I can go about doing this?

Code:

#include <stdio.h>


int main(int argc, const char *argv[])
{
    int height = 0;
    int i=0,j=0,k=0;
    
    do 
    {
        
        printf("Height: ");
        scanf("%d", &height);
    }
    while (height < 0 || height > 23); 
    
    


    int spacing=height-1;
    int hash=2;
    
    for (i=0; i<height; i++)
        {
            for (j=spacing; j>0; j--)
            {
                printf(" ");
            }
            for (k=0; k<hash; k++)
            {
                printf("#");
            }
            spacing--;
            hash++;
            printf("\n");
        }
        
    return 0;
}

easiest way is to use either a do..while loop, or just a if..else after the input. i believe this is called input validation, or validating inputs