examples from student repo

examples/w1_2.rs

+// a function taking no arguments returning the unit type
+fn a() -> () {
+    let _a: i32 = 5; // this returns a unit type
+}
+
+// a function taking two i32 arguments returning the i32 type
+fn b(_x: i32, _y: i32) -> i32 {
+    3 // this returns 3 (as i32)
+}
+
+// a function taking two i32 arguments returning the i32 type
+// with some let statements
+fn c(x: i32, y: i32) -> i32 {
+    let a: i32 = 5;
+    let b: i32 = x + y; // this will be an infix operator "+""
+    -a - (-b) * y // here we have prefix operator "-"
+}
+
+
+// More advanced statements
+
+// a function taking two bool arguments returning the bool type
+// with some let statements and function calls
+fn a(x: bool, y: bool) -> bool {
+    if x && y {
+        let a: bool = true;
+        y || a
+    } else {
+        x && false
+    }
+}
+
+// a function taking two bool arguments returning the i32 type
+// with some let statements and function calls
+fn b(x: bool, y: bool) -> i32 {
+    let a: bool = a(x, y || false);
+    let mut b: i32 = 0;
+    if a && y {
+        let a: bool = true; // shadowing
+        if y || a {
+            b = b + 1;
+        };
+    } else {
+        if !(x && false) {
+            b = b - 1;
+        }
+    };
+    b + 3
+}
+
+// a function taking two bool arguments returning the i32 type
+// while
+fn c(x: bool, y: bool) -> i32 {
+    let mut b: i32 = 0;
+    let mut c: i32 = 1;
+    while (b < 10) {
+        c = c * 2;
+    };
+    c
+}
+
+fn main() {}