diff --git a/src/verify.py b/src/verify.py
new file mode 100644
index 0000000..4c7274e
--- /dev/null
+++ b/src/verify.py
@@ -0,0 +1,10 @@
+array = [2,4,6,8,10,12,14,16,18,20]
+def is_element_in_list(number : int) -> bool:
+    if number in array:
+        print("Numero presente")
+        return True
+    print("Numero non presente")
+    return False
+if __name__ == "__main__":
+    n = int(input("Inserisci numero: "))
+    is_element_in_list(n)
diff --git a/tests/test_verify.py b/tests/test_verify.py
new file mode 100644
index 0000000..7582fb9
--- /dev/null
+++ b/tests/test_verify.py
@@ -0,0 +1,16 @@
+
+##Write a software that verifies if a number is present in a pre-defined array.
+##Output example:
+##Insert number 3
+##The number 3 is [not] present in the array.
+##
+success_test_array = [2,4,6,8,10,12,14,16,18,20]
+fail_test_array = range(35,100)
+import src.verify as verify
+
+def test_verify():
+    for i in success_test_array:
+        assert verify.is_element_in_list(i) == True
+    for i in fail_test_array:
+        if i not in success_test_array:
+            assert verify.is_element_in_list(i) == False