what is !DOCTYPE for in html code example

df to sql code example different methdos to create object code example two dimensional array on js code example tcp server login python code example constructor of a class python code example check local mysql password code example python time.sleep code code example hit url in angular 8 componenet code example $variable_product1->regular_price code example move image from css to html code example awesome icons phone color change code example python drop rows code example