description update

challenges/declaring-variables/description.md

@@ -1,34 +1,27 @@
-In Rust, variables are immutable by default. This means that once a value is bound to a variable, it cannot be changed. This is a key feature of Rust that helps ensure safety and prevent bugs by avoiding unexpected changes to values.
+## Declaring variables challenge
 
-In this challenge, you will declare and use immutable variables in Rust. You will be given a function where you need to declare variables and use them to perform specific operations. The goal is to get comfortable with the concept of immutability and understand how to use immutable variables effectively.
+Declaring variables in programming is a fundamental concept that allows you to **store and manipulate data**. Variables are used to store values that can be accessed and modified throughout the program.
 
-## Your task
+In Rust, variables are declared using the `let` keyword followed by the variable name and an optional type annotation.
 
-Your task is to complete the given function by declaring immutable variables and using them to perform specific operations. You need to calculate the area of a rectangle and return the result.
+In Rust, variables are **immutable by default**. This means that once a value is bound to a variable, it cannot be changed. This is a key feature of Rust that helps ensure safety and prevent bugs by avoiding unexpected changes to values.
 
-## Requirements
+## Your task
 
-- Declare two immutable variables, `width` and `height`, and assign them values.
-- Calculate the area of the rectangle using the formula `area = width * height`.
-- Return the calculated area.
+In this challenge, you will declare and use immutable variables in Rust. You will be given a function where you need to **declare variables** and use them to perform specific operations. The goal is to get comfortable with the concept of **immutability and understand how to use immutable variables effectively.**
 
-## Example
+Your task is to define two immutable variables inside the function using the `let` keyword:
 
-```rust
-fn calculate_area() -> u32 {
-    // Declare width and height
-    let width = 10;
-    let height = 5;
+- `width` with a value of `10`
+- `height` with a value of `5`
 
-    // Calculate area
-    let area = width * height;
+Then, calculate the area of a rectangle using the formula `area = width * height` and return the calculated area.
 
-    // Return area
-    area
-}
+## Requirements
 
-assert_eq!(calculate_area(), 50);
-```
+- Declare two immutable variables, `width` and `height`, and assign them values.
+- Calculate the area of the rectangle using the formula `width * height`.
+- Return the calculated area.
 
 ## Hints