adding immutable example

immutable/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "immutable"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

immutable/Makefile

@@ -0,0 +1,13 @@
+format:
+	cargo fmt --quiet
+
+lint:
+	cargo clippy --quiet
+
+test:
+	cargo test --quiet
+
+run:
+	cargo run 
+
+all: format lint test run

immutable/immutable-py.py

@@ -0,0 +1,11 @@
+def add_one_to_list(lst):
+    for i in range(len(lst)):
+        lst[i] += 1
+
+lst = [1, 2, 3]
+add_one_to_list(lst)
+print(lst)
+
+# This will modify the list outside of the function
+lst[0] += 1
+print(lst)

immutable/src/main.rs

@@ -0,0 +1,11 @@
+/* An example of an immutable list */
+
+//This will generate a compliation error because mut is not needed
+fn main(){
+// a vector of immutable integers
+let mut v = vec![1, 2, 3];
+//print all the elements in the vector
+for i in &v {
+    println!("{}", i);
+}
+}