Update getting-started.rst

Author: tanuj-rai

doc/en/getting-started.rst

@@ -199,6 +199,27 @@ This is outlined below:
 
 Note that attributes added at class level are *class attributes*, so they will be shared between tests.
 
+Compare floating-point values with pytest.approx
+--------------------------------------------------------------
+
+.. note::
+
+    ``pytest`` also provides a number of utilities to make writing tests easier.
+    For example, you can use :func:`pytest.approx` to compare floating-point
+    values that may have small rounding errors:
+
+    .. code-block:: python
+
+        # content of test_approx.py
+        import pytest
+
+        def test_sum():
+            assert (0.1 + 0.2) == pytest.approx(0.3)
+
+    This avoids the need for manual tolerance checks or using
+    ``math.isclose`` and works with scalars, lists, and NumPy arrays.
+
+
 Request a unique temporary directory for functional tests
 --------------------------------------------------------------