{"id":1930,"date":"2024-08-05T14:02:45","date_gmt":"2024-08-05T13:02:45","guid":{"rendered":"https:\/\/funtechsummercamps.com\/blog\/?p=1930"},"modified":"2026-04-14T15:25:43","modified_gmt":"2026-04-14T14:25:43","slug":"what-does-def-mean-in-python","status":"publish","type":"post","link":"https:\/\/funtechsummercamps.com\/blog\/what-does-def-mean-in-python\/","title":{"rendered":"What Does \u2018def\u2019 Mean in Python? (Definition, Explanation & Examples)"},"content":{"rendered":"\n

Python is a popular programming language that kids as young as 11<\/a> years old can learn. In the working world, it is widely used in applications ranging from web development to scientific computing. But at FunTech, kids can learn how to make games using it.<\/p>\n\n\n\n

During our\u00a0Python courses<\/a>, \u2018def\u2019 is one of the most important concepts in Python that will be taught. But just what is \u2018def\u2019 in Python, and how should it be used?<\/p>\n\n\n\n

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What does def mean in Python?<\/strong>

In Python, def starts a function definition. A function is a reusable block of code that runs when you call its name.<\/p> <\/div> <\/div>\n\n\n\n

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In Python, \u2018def\u2019 stands for definition and is used to create or define a function. When a programmer wants to create a new function, they use the def keyword followed by the function name. The function name should be descriptive and should convey the purpose of the function.<\/p>\n\n\n\n

But how do you use \u2018def\u2019 in Python? Here\u2019s are some examples in an easy way that kids can understand.<\/p>\n\n\n\n

7 examples of how to use \u2018def\u2019 in Python<\/h2>\n\n\n\n

1. Hello, World! Function<\/h3>\n\n\n\n

This function prints “Hello, World!” when called.<\/p>\n\n\n\n

def say_hello():\n    print(\"Hello, World!\")\n\n# Calling the function\nsay_hello()<\/code><\/pre>\n\n\n\n
2. Adding Two Numbers<\/h3>\n\n\n\n
This function takes two numbers as input and returns their sum.<\/p>\n\n\n\n
def add_numbers(a, b):\n    return a + b\n\n# Calling the function\nresult = add_numbers(3, 4)\nprint(\"The sum is:\", result)<\/code><\/pre>\n\n\n\n
3. Greeting a Person<\/h3>\n\n\n\n
This function takes a person’s name as input and prints a personalised greeting.<\/p>\n\n\n\n
def greet(name):\n    print(f\"Hello, {name}!\")\n\n# Calling the function\ngreet(\"Alice\")<\/code><\/pre>\n\n\n\n
4. Finding the Largest Number<\/h3>\n\n\n\n
This function takes three numbers and returns the largest one.<\/p>\n\n\n\n
def find_largest(a, b, c):\n    if a > b and a > c:\n        return a\n    elif b > a and b > c:\n        return b\n    else:\n        return c\n\n# Calling the function\nlargest = find_largest(3, 7, 5)\nprint(\"The largest number is:\", largest)<\/code><\/pre>\n\n\n\n
5. Checking if a Number is Even<\/h3>\n\n\n\n
This function checks if a given number is even and returns True or False.<\/p>\n\n\n\n
def is_even(number):\n    return number % 2 == 0\n\n# Calling the function\nprint(\"Is 4 even?\", is_even(4))\nprint(\"Is 7 even?\", is_even(7))<\/code><\/pre>\n\n\n\n
6. Counting Down<\/h3>\n\n\n\n
This function counts down from a given number to zero.<\/p>\n\n\n\n
def countdown(n):\n    while n >= 0:\n        print(n)\n        n -= 1\n\n# Calling the function\ncountdown(5)<\/code><\/pre>\n\n\n\n
7. Drawing a Square (using Turtle graphics)<\/h3>\n\n\n\n
This function draws a square using the Turtle graphics library.<\/p>\n\n\n\n
import turtle\n\ndef draw_square():\n    for _ in range(4):\n        turtle.forward(100)\n        turtle.right(90)\n\n# Calling the function\nturtle.speed(1)\ndraw_square()\nturtle.done()<\/code><\/pre>\n\n\n\n
Kids can learn Python with FunTech<\/h2>\n\n\n\n