Add angle function to NumPy Frontend

ivy/functional/frontends/numpy/mathematical_functions/handling_complex_numbers.py

@@ -5,6 +5,14 @@
 )
 
 
+@to_ivy_arrays_and_back
+def angle(z, deg=False):
+    angle = ivy.angle(z, deg=deg)
+    if deg and len(z.shape) == 0:
+        angle = ivy.astype(angle, ivy.float64)
+    return angle
+
+
 @to_ivy_arrays_and_back
 def _imag(val):
     return ivy.imag(val)

ivy/functional/ivy/experimental/elementwise.py

@@ -676,8 +676,8 @@ def angle(
     -------
     ret
         Returns an array of angles for each complex number in the input.
-        If def is False(default), angle is calculated in radian and if
-        def is True, then angle is calculated in degrees.
+        If deg is False(default), angle is calculated in radian and if
+        deg is True, then angle is calculated in degrees.
 
     Examples
     --------

ivy_tests/test_ivy/test_frontends/test_numpy/test_mathematical_functions/test_handling_complex_numbers.py

@@ -6,6 +6,34 @@
 from ivy_tests.test_ivy.helpers import handle_frontend_test
 
 
+# angle
+@handle_frontend_test(
+    fn_tree="numpy.angle",
+    dtype_and_x=helpers.dtype_and_values(
+        available_dtypes=helpers.get_dtypes("complex")
+    ),
+    deg=st.booleans(),
+)
+def test_numpy_angle(
+    dtype_and_x,
+    frontend,
+    test_flags,
+    fn_tree,
+    on_device,
+    deg,
+):
+    input_dtypes, x = dtype_and_x
+    helpers.test_frontend_function(
+        input_dtypes=input_dtypes,
+        frontend=frontend,
+        test_flags=test_flags,
+        fn_tree=fn_tree,
+        on_device=on_device,
+        z=x[0],
+        deg=deg,
+    )
+
+
 # imag
 @handle_frontend_test(
     fn_tree="numpy.imag",