Is it okay to call a man who isn't my biological father, "Daddy"?

YES is ok to call him daddy.....why shoulnd it be his the one that .............oh i think u should give ur biologycal father a chance he sill is ur dad arent u wondering to find out what his like ??? dont wait ..and be mad cuz he wasnt there ....some day u may not have the chance to choose what if he pes away???then it will be to late!!!hey two dads ur consided ur self lucky!!!!!!