how to read an entire port (the 8 bites)

need to read PORTD some how that i can see which bites are high and which low, im using a nano and need the reading all bits at once.

Read up on direct port manipulation.

my_var = PIND; //Read the PORTD

my_var = PIND;        //Read the PORTD

It's better when the useless comments match the code.