Feat: add control flow section

Author: MahdiTa97

CONTROL_FLOW/Cargo.lock

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

CONTROL_FLOW/Cargo.toml

@@ -0,0 +1,3 @@
+### Read more details here:
+
+https://doc.rust-lang.org/book/ch03-05-control-flow.html#conditional-loops-with-while

CONTROL_FLOW/README.md

@@ -0,0 +1,107 @@
+// ====== if Expressions ======
+
+// fn main() {
+//     let number = 3;
+
+//     if number % 4 == 0 {
+//         println!("number is divisible by 4");
+//     } else if number % 3 == 0 {
+//         println!("number is divisible by 3");
+//     } else if number % 2 == 0 {
+//         println!("number is divisible by 2");
+//     } else {
+//         println!("number is not divisible by 4, 3, or 2");
+//     }
+// }
+
+// fn main() {
+//     let condition = true;
+//     let number = if condition { 5 } else { 6 };
+
+//     println!("The value of number is: {number}");
+// }
+
+// ====== Repetition with Loops ======
+// 3 kinds of loops:
+// loop,
+// while, and
+// for.
+// fn main() {
+//     loop {
+//         println!("again!");
+//         // break;
+//     }
+// }
+
+// fn main() {
+//     let mut counter = 0;
+//     let result = loop {
+//         counter += 1;
+//         if counter == 10 {
+//             break counter * 2;
+//         }
+//     };
+
+//     println!("The result is {result}")
+// }
+
+// ====== Loop Labels to Disambiguate Between Multiple Loops ======
+// fn main() {
+//     let mut count = 0;
+//     'counting_up: loop {
+//         println!("count = {count}");
+//         let mut remaining = true;
+
+//         loop {
+//             println!("remaining = {remaining}");
+//             if remaining == false {
+//                 break;
+//             }
+//             if count == 2 {
+//                 break 'counting_up;
+//             }
+//             remaining = false;
+//         }
+
+//         count += 1;
+//     }
+//     println!("End count = {count}");
+// }
+
+// ====== Conditional Loops with while ======
+// fn main() {
+//     let mut number = 3;
+//     while number != 0 {
+//         println!("{number}!");
+//         number -= 1;
+//     }
+
+//     println!("LEFTOFF!!!");
+// }
+
+// fn main() {
+//     let a = [10, 20, 30, 40, 50];
+//     let mut index = 0;
+
+//     while index < 5 {
+//         println!("the value is: {}", a[index]);
+
+//         index += 1;
+//     }
+// }
+
+// fn main() {
+//     let a = [10, 20, 30, 40, 50];
+
+//     for element in a {
+//         println!("the value is: {element}");
+//     }
+// }
+
+fn main() {
+    // reverse the range
+    for number in (1..4).rev() {
+        println!("{number}!");
+    }
+    println!("LIFTOFF!!!");
+}

CONTROL_FLOW/src/main.rs

@@ -5,3 +5,4 @@
 - [GUESSING_GAME](./GUESSING_GAME/)
 - [VARIABLES_AND_DATA_TYPES](./VARIABLES_AND_DATA_TYPES/)
 - [FUNCTIONS](./FUNCTIONS/)
+- [CONTROL_FLOW](./CONTROL_FLOW/)