logical operator and while loop

[time to c]

what i am doing wrong?

#include<stdio.h>

int main()
{
    int num;
    do
    {
        printf("enter 1 2 or 3 to exit : ");
        scanf("%d",&num);
    }while(num!=1 || num!=2 || num!=3);
    return 0;
}

[Moschops]

(num!=1 || num!=2 || num!=3)
is the same as
(true)

Can you think of a value of num for which num!=1 || num!=2 || num!=3 will be false?

[gelatine]

so he means that you should use && instead of ||

[time to c]

thanks. XD