Functions can take inputs (parameters) and give you results (return values).
📥 Parameters
Parameters let you pass data into a function.
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void Greet(string name)
{
Console.WriteLine($"Hello, {name}!");
}
Greet("Taylor"); // Hello, Taylor!
📤 Return Values
A function can return a value using the return keyword.
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int Square(int n)
{
return n * n;
}
int result = Square(5); // 25
🧑🤝🧑 Multiple Parameters
You can have as many parameters as you need.
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double Average(int a, int b, int c)
{
return (a + b + c) / 3.0;
}
🚫 No Return Value
If your function doesn’t return anything, use void:
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void PrintLine()
{
Console.WriteLine("This function returns nothing!");
}
💡 Try It!
Write a function that takes a name and age, and prints a greeting:
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void Greet(string name, int age)
{
Console.WriteLine($"Hello, {name}! You are {age} years old.");
}
Next: Static vs. instance methods!
