Change value of selected cells to 0 (zero)

Hi everyone!

Would like to ask you, how can i change the value of selected cell in datagridview?

I have a button on my form "Null Cell" and i would like to press on a cell (maybe more than one) on datagridview and by pressing "Null Cell" change the value to 0.

Thanks a lot,

Sincerely,

Adil Aliyev