What is the difference between IND and NAN numbers

Question

A NAN value means Not A Number and IND value means Indeterminate number. But what is the difference between these two. How can we represent both in c++.

Answer 1

But what is the difference between these two.

They are both the same thing. Some platforms choose to display a non-number as some variant of NaN, while others choose to display it as some variant of IND.

How can we represent both in c++.

std::numeric_limits<double>::quiet_NaN() (or float or long double, if you prefer).