new programm for password generation

vectors.rs

@@ -0,0 +1,51 @@
+// vectors
+// jesus respawn is near!
+
+
+// main function
+fn main() { 
+    // assigning vectors
+    let mut v = vec![1, 2, 3, 4, 5]; // v: vec<i32>
+    let w = vec![10; 0]; // vector of 10 zeroes
+    
+    // print particular element of v 
+    println!("the 3. element of v is:{}", v[2]); // counting elements beginning at 0
+    
+    // index
+    let i: usize = 0;
+    // let j: i32 = 0; // doesn't work!
+    println!("ite element: {}", v[i]);
+
+    // handling out of bound errors
+    match w.get(8) { // use 'get()' or 'get_mut()'
+        Some(x) => println!("item 7 is: {}", x),
+        None => println!("Sorry, this vectori is to short!")
+    }
+    
+    // iteration of vectors
+    for i in &v { // using unmutable references
+        println!("A reference to {}", i);
+    }
+    for i in &mut v {
+        println!("A mutable reference to {}", i);
+    }
+    for i in v { // note: you cannot use vector again!
+        println!("Take ownership of the vector and its elements {}", i);
+    }
+
+    let a = 5; // a: i32
+    let b = true; // b: bool
+    let a2 = double(a); 
+    let b2 = change_truth(b);
+    println!("{}", a); // works, because i32 has no pointer -> copy trait implemented
+    println!("{}", b); // works -> bool has copy trait
+}
+
+
+// function
+fn double(x: i32) -> i32 {
+    x * 2
+}
+fn change_truth(x: bool) -> bool {
+    !x
+}