# type(a, data type) test if a is data type; # type(a) return a data type; type(a_,number):=isnumber(a); type(a_,Complex):=iscomplex(a); type(a_,integer):=isinteger(a); type(a_,float):=isfloat(a); type(a_,function):=isfunction(a); type(a_,odd):=isodd(a); type(a_,even):=iseven(a); type(a_,constant):=isconstant(a);