How do I set up a function in Python, JavaScript, and Java?

How do I set up a function in Python, JavaScript, and Java?

In Python, you can define a function using the 'def' keyword. For example:

def my_function():
    print('Hello, World!')

In JavaScript, you can use the 'function' keyword:

function myFunction() {
    console.log('Hello, World!');
}

In Java, you define a function within a class:

class MyClass {
    void myFunction() {
        System.out.println('Hello, World!');
    }
}

What are the differences in syntax between these languages?

The main differences are:

• Python uses indentation to define blocks, while JavaScript and Java use curly braces.
• Java requires you to define the return type of the function, whereas Python and JavaScript do not.

Can you give me an example of a function that takes parameters?

Sure! Here are examples of functions with parameters:

Python:

def greet(name):
    print(f'Hello, {name}!')

JavaScript:

function greet(name) {
    console.log(`Hello, ${name}!`);
}

Java:

class MyClass {
    void greet(String name) {
        System.out.println('Hello, ' + name + '!');
    }
}

How do I return values from these functions?

To return values:

In Python:

def add(a, b):
    return a + b

In JavaScript:

function add(a, b) {
    return a + b;
}

In Java:

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