Using a weird assignment / conditional

gistfile1.txt

#import <stdio.h>

int main() {
    
    int value = 0;
    
    if (5 == (value = thisReturnsFive())) {
        printf("It works!\n");
    } else {
        printf("It doesn't work!\n");
    }
    
    return 0;
}


int thisReturnsFive() {
    return 5;
}