ctrl-d didn't stop the while(getchar()!=EOF) loop

Here is my code. I run it in ubuntu with terminal. when I type (a CtrlD) in terminal, the program didn't stop but continued to wait for my input.

Isn't CtrlD equal to EOF in unix?

Thank you.

#include<stdio.h>

main() {
    int d;
    while(d=getchar()!=EOF) {
        printf("\"getchar()!=EOF\" result is %d\n", d);
        printf("EOF:%d\n", EOF);
    }
        printf("\"getchar()!=EOF\" result is %d\n", d);
}