Rust Beginner Syntax Quiz (20 Questions)

Q1: Define the main function.
() {
    // Code goes here
}

Q2: Print "Hello, Rust!" to the console.
    ()

Q3: Declare an immutable variable `x` with value `10`.
     x 10

Q4: Declare a mutable variable `y` with value `20`.
     y 20

Q5: Add a single-line comment.
     This is a comment

Q6: Complete the `if` statement.
     x 5 {
         // do something
    }

Q7: Add an `else` block.
    if true { } {
         // otherwise
    }

Q8: Start an infinite loop.
     {
         // repeat forever
    }

Q9: Exit a loop early.
    loop { ;
    }

Q10: Loop through numbers 1 to 5.
     i 16 {
         // use i
    }

Q11: Start a pattern match.
     some_value {
         _ => {}
    }

Q12: Define a struct named `Point`.
     Point {
         x: i32,
         y: i32,
    }

Q13: Define an enum named `Color`.
     Color {
         Red,
         Green,
         Blue,
    }

Q14: Explicitly return a value.
    fn get_five() -> i32 {
         5
    }

Q15: Annotate variable `age` as `u32`.
    let age = 30

Q16: Declare a module named `utils`.
     utils

Q17: Bring `HashMap` into scope.
     stdcollectionsHashMap

Q18: Pass a reference to `val`.
    fn print_ref(s: String) { }
    let val = String::from("Rust");
    print_ref(val)

Q19: Dereference a pointer `ptr`.
    let num = ptr

Q20: Define a function with a generic type `T`.
    fn identity<>(x: ) -> { x }