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

# Problem Statement
* A variable `x` is provided to you.

* Repeatedly decrease the value of the variable 
  `x` by 3 each time,
  as long as `x` is greater than or equal to 0.

* Print the number of times the iteration runs.

## Input
```
   integer
```
## Output
```
   iteration count
```

## Sample Input
```
   21
```
## Sample Ouput
```
   8
```
# Coding Exercise

Write your code below. It is recommended​ that you try solving the exercise yourself before viewing the solution.

> **Note:** There is a `test` function given in the code for testing purposes. Do not modify it.


> **Important Note:** A mutable variable `x` is already provided to you. This has the desired value. You just have to write the `while` loop construct.


Good luck! 🤞



This challenge will test your knowledge of while loops.

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

Challenge 2: Count Iterations of a Loop Until a Condition

Problem Statement