// C# - Methods in classes
public class Calculator
{
    // Instance method
    public int Add(int a, int b)
    {
        return a + b;
    }
    
    // Static method
    public static int Multiply(int a, int b)
    {
        return a * b;
    }
    
    // Method with ref parameter
    public void Increment(ref int value)
    {
        value++;
    }
}

// Rust - Standalone functions
fn add(a: i32, b: i32) -> i32 {
    a + b  // No 'return' needed for final expression
}

fn multiply(a: i32, b: i32) -> i32 {
    return a * b;  // Explicit return is also fine
}

// Function with mutable reference
fn increment(value: &mut i32) {
    *value += 1;
}

fn main() {
    let result = add(5, 3);
    println!("5 + 3 = {}", result);
    
    let mut x = 10;
    increment(&mut x);
    println!("After increment: {}", x);
}

// C# - Statements vs expressions
public int GetValue()
{
    if (condition)
    {
        return 42;  // Statement
    }
    return 0;       // Statement
}

// Rust - Everything can be an expression
fn get_value(condition: bool) -> i32 {
    if condition {
        42  // Expression (no semicolon)
    } else {
        0   // Expression (no semicolon)
    }
    // The if-else block itself is an expression that returns a value
}

// Or even simpler
fn get_value_ternary(condition: bool) -> i32 {
    if condition { 42 } else { 0 }
}

// No parameters, no return value (returns unit type ())
fn say_hello() {
    println!("Hello!");
}

// Multiple parameters
fn greet(name: &str, age: u32) {
    println!("{} is {} years old", name, age);
}

// Multiple return values using tuple
fn divide_and_remainder(dividend: i32, divisor: i32) -> (i32, i32) {
    (dividend / divisor, dividend % divisor)
}

fn main() {
    let (quotient, remainder) = divide_and_remainder(10, 3);
    println!("10 ÷ 3 = {} remainder {}", quotient, remainder);
}

// C# if statements
int x = 5;
if (x > 10)
{
    Console.WriteLine("Big number");
}
else if (x > 5)
{
    Console.WriteLine("Medium number");
}
else
{
    Console.WriteLine("Small number");
}

// C# ternary operator
string message = x > 10 ? "Big" : "Small";

// Rust if expressions
let x = 5;
if x > 10 {
    println!("Big number");
} else if x > 5 {
    println!("Medium number");
} else {
    println!("Small number");
}

// Rust if as expression (like ternary)
let message = if x > 10 { "Big" } else { "Small" };

// Multiple conditions
let message = if x > 10 {
    "Big"
} else if x > 5 {
    "Medium"
} else {
    "Small"
};

// C# loops
// For loop
for (int i = 0; i < 5; i++)
{
    Console.WriteLine(i);
}

// Foreach loop
var numbers = new[] { 1, 2, 3, 4, 5 };
foreach (var num in numbers)
{
    Console.WriteLine(num);
}

// While loop
int count = 0;
while (count < 3)
{
    Console.WriteLine(count);
    count++;
}

// Rust loops
// Range-based for loop
for i in 0..5 {  // 0 to 4 (exclusive end)
    println!("{}", i);
}

// Iterate over collection
let numbers = vec![1, 2, 3, 4, 5];
for num in numbers {  // Takes ownership
    println!("{}", num);
}

// Iterate over references (more common)
let numbers = vec![1, 2, 3, 4, 5];
for num in &numbers {  // Borrows elements
    println!("{}", num);
}

// While loop
let mut count = 0;
while count < 3 {
    println!("{}", count);
    count += 1;
}

// Infinite loop with break
let mut counter = 0;
loop {
    if counter >= 3 {
        break;
    }
    println!("{}", counter);
    counter += 1;
}

// C# loop control
for (int i = 0; i < 10; i++)
{
    if (i == 3) continue;
    if (i == 7) break;
    Console.WriteLine(i);
}

// Rust loop control
for i in 0..10 {
    if i == 3 { continue; }
    if i == 7 { break; }
    println!("{}", i);
}

// Loop labels (for nested loops)
'outer: for i in 0..3 {
    'inner: for j in 0..3 {
        if i == 1 && j == 1 {
            break 'outer;  // Break out of outer loop
        }
        println!("i: {}, j: {}", i, j);
    }
}