diff --git a/data_structures/2_Arrays/expenses.py b/data_structures/2_Arrays/expenses.py
new file mode 100644
index 0000000..9fc1994
--- /dev/null
+++ b/data_structures/2_Arrays/expenses.py
@@ -0,0 +1,23 @@
+lst= [2200,2350,2600,2130,2190]
+
+
+# 1 
+print(f"${lst[1] - lst[0]}")
+
+# 2
+print(f"You spent ${lst[0] + lst[1] +lst[2]} ")
+
+# 3
+
+
+for expense in lst:
+    if expense == 2000:
+        print(expense + " is exactly 2000")
+    print("month is $2000") 
+
+lst.append(1980)
+
+
+lst[3] = lst[3] - 200
+
+print(lst[3])
\ No newline at end of file
diff --git a/data_structures/2_Arrays/marvel.py b/data_structures/2_Arrays/marvel.py
new file mode 100644
index 0000000..6c7baf3
--- /dev/null
+++ b/data_structures/2_Arrays/marvel.py
@@ -0,0 +1,26 @@
+heros=['spider man','thor','hulk','iron man','captain america']
+
+print(len(heros))
+
+heros.append("black panther")
+
+print(heros)
+
+heros.remove("black panther")
+print(heros)
+
+heros[3] = "black panther"
+
+print(heros)
+
+heros.remove("thor")
+heros.remove("hulk")
+
+print(heros)
+
+heros.append("doctor strange")
+
+print(heros)
+heros.sort()
+
+print(heros)
\ No newline at end of file
diff --git a/data_structures/2_Arrays/odd_even_numbers.py b/data_structures/2_Arrays/odd_even_numbers.py
new file mode 100644
index 0000000..ec1c4b7
--- /dev/null
+++ b/data_structures/2_Arrays/odd_even_numbers.py
@@ -0,0 +1,9 @@
+max = int(input("Enter max number: "))
+
+odd_numbers = []
+
+for i in range(1, max):
+    if i % 2 == 1:
+        odd_numbers.append(i)
+
+print("Odd numbers: ", odd_numbers)