From 70015766f87dcf6df57cfb74e63e149ac9917b15 Mon Sep 17 00:00:00 2001
From: melabady1 <34304958+melabady1@users.noreply.github.com>
Date: Mon, 23 Jan 2023 11:35:01 +0200
Subject: [PATCH 1/2] add diff to numpy frontend

---
 .../sums_products_differences.py                    | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/ivy/functional/frontends/numpy/mathematical_functions/sums_products_differences.py b/ivy/functional/frontends/numpy/mathematical_functions/sums_products_differences.py
index e757e7b0cf3a0..dadd40bfd624a 100644
--- a/ivy/functional/frontends/numpy/mathematical_functions/sums_products_differences.py
+++ b/ivy/functional/frontends/numpy/mathematical_functions/sums_products_differences.py
@@ -116,3 +116,16 @@ def nancumprod(a, /, axis=None, dtype=None, out=None):
 def nancumsum(a, /, axis=None, dtype=None, out=None):
     a = ivy.where(ivy.isnan(a), ivy.zeros_like(a), a)
     return ivy.cumsum(a, axis=axis, dtype=dtype, out=out)
+
+
+@to_ivy_arrays_and_back
+def diff(
+    x,
+    /,
+    *,
+    n=1,
+    axis=-1,
+    prepend=None, 
+    append=None
+):
+    return ivy.diff(x, n=n, axis=axis, prepend=prepend, append=append)

From e5da1c30816cbc61dc8d5911a79ac1fc1e6d4695 Mon Sep 17 00:00:00 2001
From: melabady1 <34304958+melabady1@users.noreply.github.com>
Date: Mon, 23 Jan 2023 11:37:56 +0200
Subject: [PATCH 2/2] add test_numpy_diff to frontend tests

---
 .../test_sums_products_differences.py         | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/ivy_tests/test_ivy/test_frontends/test_numpy/test_mathematical_functions/test_sums_products_differences.py b/ivy_tests/test_ivy/test_frontends/test_numpy/test_mathematical_functions/test_sums_products_differences.py
index 15b057de121e5..d656b53f6030c 100644
--- a/ivy_tests/test_ivy/test_frontends/test_numpy/test_mathematical_functions/test_sums_products_differences.py
+++ b/ivy_tests/test_ivy/test_frontends/test_numpy/test_mathematical_functions/test_sums_products_differences.py
@@ -327,3 +327,33 @@ def test_numpy_nansum(
         where=where,
         keepdims=keepdims,
     )
+
+
+# diff
+@handle_frontend_test(
+    fn_tree="numpy.diff",
+    dtype_x_axis=helpers.dtype_values_axis(
+        available_dtypes=helpers.get_dtypes("valid"),
+        min_num_dims=1,
+        valid_axis=True,
+        force_int_axis=True,
+    ),
+)
+def test_numpy_diff(
+    dtype_x_axis,
+    frontend,
+    test_flags,
+    fn_tree,
+    on_device,
+):
+    input_dtype, x, axis = dtype_x_axis
+    np_frontend_helpers.test_frontend_function(
+        input_dtypes=input_dtype,
+        frontend=frontend,
+        test_flags=test_flags,
+        fn_tree=fn_tree,
+        on_device=on_device,
+        x=x[0],
+        axis=axis,
+    )
+