Why aren't my If and Else statements doing nothing? (c++)

I just started learning c++ and I'm trying to make a dice game where the user puts in a number between 1 and 6 and then the code prints a random number within that range and if y and z are the same you win.

This is the code I have but when I put in a number that isn't in the array it works as if it were in the array.

#include <iostream>
#include <stdlib.h>
#include <time.h>

int main() {
    for (; ; ) {
        int x[6] = { 1,2,3,4,5,6 }; //dice numbers
        int y;                      //user choice
        int z;                      // random number generated

        std::cout << "Pick a number between 1 and 6\n";
        std::cin >> y;

        if (y >= 1 || y <= 6) {     //if y is greater then or = to 1 or less then 
            std::cout << "Rolling dice, if your number is the correct number you win\n";
            srand(time(NULL));      //this makes rand() actually random.
            z = rand() % 6;
            std::cout << "The number is " << x[z] << "\n" << "The game will repeat..\n";
        }

        else {                      //if the num generated isn't within 1 or 6 this is printed
            std::cout << "ERROR: Generated number is not within 1 nor 6, try again.";

        }

        if (y == z) {
            std::cout << "Congratulations you rolled the right number";
        }
    }

(input is y) (the array is x) (the number you need to win is z)

also I may change it so that it just reads the array so that the user could even put in the amount of sides the dice would have if this goes well.