Digital option with Black and Scholle

unction CallBlackScholesDigit(S,K,r,sigma,q,T,t)
{
 
 return (NCDF(D2BlackScholes(S,K,r,sigma,q,T,t),0,1)*K*Math.exp(r*(T-t)*-1.0));
}

function PutBlackScholesDigit(S,K,r,sigma,q,T,t)
{
 
 return (NCDF(-D2BlackScholes(S,K,r,sigma,q,T,t),0,1)*K*Math.exp(r*(T-t)*-1.0));
}