I have a very simple program that declares a few variables and prints Hello!
I tried to find where the unused variables are stored in the IDA like I found the Hello! (by clicking the lea rcx, _Format ; "Hello!") but I couldn’t find their name or anything.
The code is

#include <stdio.h>

// global variables
char my_char = 'b';
short my_short = 4000;
int my_int = 10;
long my_long = 65535;
double my_double = 4.32;

int main() {
    printf("Hello!");
    return 0;
}