This course provides the best approach to learn Rust, starting from the basics and advancing to complex topics. It is an introduction to Rust for beginners aspiring to become skilled Rust developers.

The word is out: developers love Rust. It's rapidly becoming a top choice for systems and embedded programmers, and the demand for Rust developers is rising. Known for its performance, reliability, and productivity—especially compared to C++—Rust is a powerful language to master. If you're a systems developer, it's a fantastic next step.
In this course, you'll learn Rust by actively engaging in coding. You’ll start with a simple "Hello world" program and cover essential concepts like arrays, strings, vectors, enums, structures, traits, generics, functions, and logic. You'll also dive into advanced topics such as lifetime and memory management.
By the end of this course, you'll have a solid foundation in Rust programming and be well-prepared to take on more advanced concepts, making it ideal for Rust beginners looking to become proficient Rust developers.

Rust Programming Language

fn test(mut x:i32) {
    // define a mutable variable
    let mut count = 0;
    // define a while loop
    while x >= 0 { 
       x = x - 3; // decrement the value of x by 3
       count = count + 1;
    }
    println!("{}", count);
}
fn main(){
    print!("Iterations when x = 21 :");
    test(21);
    print!("Iterations when x = 33 :");
    test(33);
}

### Explanation
* On **line 3**, a mutable variable `count` is initialized with `0`.
- **`while` construct**
   * `while` definition
      * On **line 5**,`while` condition `x >= 0`
        is defined i.e., the loop terminates when `x` becomes negative.
   * `while` body
      
      The body of `while` loop is defined from **line 5** to **line 8**.
      * On **line 6**, a variable `x` is decremented by 3.
      * On **line 7**, the value of `count` is incremented each time within the loop.

* When the loop breaks, the value of `count` is printed which gives the total number of iterations of the `while` loop.

The following illustration explains the code above.
>Assume that `x` is assigned the value 24 and passed to the function.

## Explanation
* On **line 3**, a mutable variable `count` is initialized with `0`.
- **`while` construct**
   * `while` definition
      * On **line 5**,`while` condition `x >= 0`
        is defined i.e., the loop terminates when `x` becomes negative.
   * `while` body
      
      The body of `while` loop is defined from **line 5** to **line 8**.
      * On **line 6**, a variable `x` is decremented by 3.
      * On **line 7**, the value of `count` is incremented each time within the loop.

* When the loop breaks, the value of `count` is printed which gives the total number of iterations of the `while` loop.

The following illustration explains the code above.
>Assume that `x` is assigned the value 24 and passed to the function.

This lesson gives a detailed solution review of the challenge in the previous lesson.

Introduction to Rust

Rust Programs

Rust Variables

Rust Data Types

Rust Operators

Rust if and if let Expressions

Rust Loops

Rust Functions

Rust Strings

Rust Vectors

Rust Structs

Conclusion

Rust Exam

Solution Review 2: Count Iterations of a Loop Until a Condition

Solution:

Explanation