[C exercise] what is the output result of the following code

#include <stdio.h>
int i;
int main()
{
    i--;
    if (i > sizeof(i))
    {
        printf(">\n");
    }
    else
    {
        printf("<\n");
    }
    return 0; 
}

answer ：‘>’

Global variables are placed in the static area , The default initialization is 0;

Local variables are placed in the stack area , If you don't initialize it when you create it, it contains random values ;

sizeof The return type of is size_t, Is an unsigned integer ;

i - - be equal to - 1;

Arithmetic conversion occurs when a negative number is compared with an unsigned integer , Convert a negative number to an unsigned integer , and -1 The unsigned integer of is very large , So the end result is ‘>’.