---
title: 6.1 Function Basics
description: A function is a named block of code that performs a specific operation. Functions allow a program to divide a larger task into smaller, reusable units and avoid repeating the same code. A function can be called from different locations…
url: "https://edcret.in/docs/cpp-programming/functions/6-1-function-basics/"
updated: "2026-09-06"
category: C++ Programming / Functions
---

# 6.1 Function Basics

A function is a named block of code that performs a specific operation. Functions allow a program to divide a larger task into smaller, reusable units and avoid repeating the same code.

A function can be called from different locations within a program. Depending on its definition, a function can accept input through parameters and return a value to the caller.

## Source Code

```
#include <iostream>

void greet()
{
    std::cout << "Hello from the function.\n";
}

int main()
{
    greet();

    return 0;
}
```

## Output

```
Hello from the function.
```

## Explanation

- `void greet()` defines a function named `greet`.
- `void` specifies that the function does not return a value.
- The statements enclosed within `{}` form the function body.
- `std::cout` inside the function displays the message when the function is executed.
- `greet();` calls the function from `main()`.
- When the function is called, program execution transfers to the function body.
- After the function finishes executing, control returns to the statement following the function call.
- A function can be called multiple times from different locations in a program.
- `return 0;` terminates the program successfully.