doc/snippets/Cwise_isNaN.cpp

// SPDX-FileCopyrightText: The Eigen Authors
// SPDX-License-Identifier: MPL-2.0

Array3d v(1, 2, 3);
v(1) *= 0.0 / 0.0;
v(2) /= 0.0;
cout << v << endl << endl;
cout << isnan(v) << endl;