• 1 (valid)
• [ ]
• [ ]3
• 4 (valid)
• [ ] 5
• [] 6
• 7 (valid)
• 8 (valid)

        

            

                
1
                
fn main() {
            
            

                
2
                
    println!("Hello World!");
            
            

                
3
                
}
            
        

    

        
/*
    
    

        
    multiline
    
    

        
    comment
    
    

        
*/
    
    

        
// single line comment
    
    

        
fn main() {
    
    

        
    let mut x = 3;
    
    

        
    let mut y = if x == 3 {
    
    

        
        4
    
    

        
    } else {
    
    

        
        5
    
    

        
    };
    
    

        
    println!("Hello World!\n");
    
    

        
    println!("{:?}", 3 + 4);
    
    

        
}
    
    

        

    
    

        
pub struct Point {
    
    

        
    x: f32,
    
    

        
    y: f32
    
    

        
}
    
    

        

    
    

        
pub const CONST: u32 = 1;
    

    

        
```rust
    
    

        
fn main() {
    
    

        
    println!("Hello World!");
    
    

        
}
    
    

        
```