Editing Technology/Software Development/General knowledge/Programming Fundamentals/Functions (section)

== Functions ==
'''Definition'''

A function is a self-contained block of code that performs a specific task or calculates a value. It takes in inputs, known as parameters or arguments, and returns an output. Functions allow you to break down complex problems into smaller, manageable tasks, promoting code reuse and modularity.

'''Function Declaration and Execution'''

To use a function, you need to declare it and then call or execute it when needed.

'''Code Example'''

Here's an example in Python that demonstrates the declaration and execution of a function:

<pre>
# Function declaration
def greet(name):
    print("Hello, " + name + "!")

# Function execution
greet("John")
</pre>

In this example, we declare a function named `greet` that takes in a parameter `name`. When the function is executed with the argument `"John"`, it will print `"Hello, John!"` to the console.