C language converts char array (string) to int

/*
Example char array to int in C language
*/

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <stdbool.h>

int main(int argc, char *argv[]) {
    char myarray[5] = {'-', '1', '2', '3', '\0'};
    int i;
    sscanf(myarray, "%d", &i);
    printf("%d",i);
    return 0;
}

output：

-123