diff --git a/Roadmap/05 - VALOR Y REFERENCIA/python/Irenetitor.py b/Roadmap/05 - VALOR Y REFERENCIA/python/Irenetitor.py
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+++ b/Roadmap/05 - VALOR Y REFERENCIA/python/Irenetitor.py	
@@ -0,0 +1,73 @@
+#Value and Reference
+
+# Data types passed by value
+
+my_int_a = 5
+my_int_b = my_int_a   # my_int_b gets a *copy* of the value 5
+my_int_b = 15         # changing my_int_b does NOT affect my_int_a
+
+print(my_int_a)   # 5
+print(my_int_b)   # 15
+
+# Data types passed by reference
+
+my_list_a = [1, 2]
+my_list_b = my_list_a  # both point to the same list in memory
+my_list_b.append(3)    # modifies the *same* object
+
+print(my_list_a)   # [1, 2, 3]
+print(my_list_b)   # [1, 2, 3]
+
+# Functions with data passed by value
+
+def my_int_func(my_int: int):
+    my_int = 100                                         # Inside function: 100
+    print("Inside function:", my_int)
+
+my_int_c = 50
+my_int_func(my_int_c)
+print("Outside function:", my_int_c)                     # Outside function: 50
+
+# Functions with data passed by reference
+
+def my_list_func(my_list: list):
+    my_list.append(3)       # modifies the original list
+    my_list_d = my_list
+    my_list_d.append(4)     # also modifies the same object
+    print("Inside function:", my_list)    # [1, 2, 3, 4]
+    print("Alias variable:", my_list_d)   # [1, 2, 3, 4]
+
+my_list_c = [1, 2]
+my_list_func(my_list_c)
+print("Outside function:", my_list_c)  # [1, 2, 3, 4]
+
+
+#Extra 
+
+bon1 = 12
+bon2 = 32
+
+def pro_v(bon_1:int, bon_2:int):
+    yum = bon_1 
+    bon_1 = bon_2
+    bon_2 = yum
+    return bon_1, bon_2
+
+bon3, bon4 = pro_v(bon1, bon2)
+print(f"{bon1}, {bon2}")
+print(f"{bon3}, {bon4}")
+
+#--------------------------------------------------------------------------
+
+bun1 = [23, 56]
+bun2 = [21, 45]
+
+def pro_r(bun_1:list, bun_2:list):
+    yum = bun_1 
+    bun_1 = bun_2
+    bun_2 = yum
+    return bun_1, bun_2
+
+bun3, bun4 = pro_v(bun1, bun2)
+print(f"{bun1}, {bun2}")
+print(f"{bun3}, {bun4}")
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