Rust keywords

Question 1

What does the loop keyword do in Rust?

Answer 1

loop creates an infinite loop. You can exit it using break

Question 2

How do you create a mutable variable in Rust?

Answer 2

Use the mut keyword. Example: let mut x = 10;

Question 3

What is the match statement used for in Rust?

Answer 3

match is used for pattern matching, similar to switch-case in other languages.

Question 4

What is the difference between while and for loops in Rust?

Answer 4

while loops run as long as a condition is true. for loops iterate over collections or ranges.

Question 5

What does the &str type represent in function parameters?

Answer 5

&str is a string slice, which represents a reference to a string. It’s used when you want to pass a string without transferring ownership.

Question 6

What is the purpose of the break keyword in a loop?

Answer 6

break is used to exit a loop early, stopping its execution.

Question 7

How do you skip the current iteration of a loop and move to the next one?

Answer 7

Use the continue keyword

Question 8

How do you declare a constant value in Rust?

Answer 8

using const

example:
const MAX_POINTS: u32 = 100;

Question 9

What is the difference between String and &str in Rust?

Answer 9

String is a heap-allocated, growable string. &str is a reference to a string slice, typically a view into a String.

Question 10

How do you convert a string slice (&str) to a String?

Answer 10

Use the to_string method. Example: “Hello”.to_string();

Question 11

How do you create an infinite loop in Rust?

Answer 11

loop {
// Code here
}