Adding Arguments

What Are Arguments?

Arguments are variables passed to a function when it is called. They allow functions to operate on different data, making them far more versatile.

Example: A Function with One Argument

def greet(str name):
    print($"Hello, {name}!");

When calling the function, provide a value for the argument:

def main():
    greet("Alice"); // Outputs: Hello, Alice!
    greet("Bob");   // Outputs: Hello, Bob!

Multiple Arguments

Functions can take multiple arguments. Declare the arguments inside the parentheses, separated by commas:

def add_two_numbers(int a, int b):
    print($"The sum is {a + b}.");

Call the function by providing two values in the correct order:

def main():
    add_two_numbers(5, 7); // Outputs: The sum is 12.

Important Notes:

The type of each argument matters. For example, if a and b are declared as int, you cannot pass str values.
The order of arguments also matters. Always pass values in the same order as declared in the function.

What’s Next?

Arguments let you pass data into functions, but sometimes you want a function to give something back. That’s where return types come in.