some more learning programms

tulpes_if.rs

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+// 'primitive' types
+// what a sunny easter day - best for programming!
+
+
+// main function
+fn main() { 
+    // assigning tulpes
+    let mut x = (1, 2); // x: (i32, i32)
+    let y = (2, 3); // y: (i32, i32)
+    x = y; // assign tulpe into another
+    
+    let x1 = x.0; // access first field of tulpe x
+    let x2 = x.1; // access second field of tulpe x
+    println!("the first element of x is: {}", x1);
+    
+    let (a, b, c) = (1, 2, 3,); // access tulpe by destructuring
+    println!("the value of a is: {}", a);
+    
+    let d =(0,); // single element tulpe
+    
+    
+    let z = 7; 
+    
+    // some looping
+    if z == 5 {
+        println!("z is five!");
+    } else if z == 3 {
+        println!("z is three!");
+    }
+    
+    else {
+        println!("z is not five and not three! :(");
+    }
+    
+    // more looping, written differently
+    let z = 9;
+    
+    let y = if z == 5 {
+        10
+    } else {
+        15
+    }; // y: i32
+    println!("y is defined as: {}", y);
+}
+