What are some examples of type annotation in different programming languages?

What are some examples of type annotation in different programming languages?

Type annotations are used to specify the data types of variables. For example, in Python, you can use:

def add(a: int, b: int) -> int:
    return a + b

In TypeScript, you might see:

let age: number = 30;

Would you like to know more about a specific language?

Can you give me an example in Java?

Sure! In Java, you can use type annotations like this:

public int add(int a, int b) {
    return a + b;
}

Here, int is the type annotation for the parameters and the return type. Do you want examples from other languages?

What about in Swift?

In Swift, you can annotate types like this:

func add(a: Int, b: Int) -> Int {
    return a + b
}

The Int specifies that both parameters and the return type are integers. Any other languages you're curious about?

Yes, can you show me an example in Ruby?

Ruby is dynamically typed, but you can use type annotations with the RBS type signature:

# typed: true
def add(a: Integer, b: Integer) -> Integer
  a + b
end

This specifies that a and b should be integers. Would you like to explore more?