🔒 What does “Def” mean?

[wide pond]

Hi , so I’m new on python and I started learning how to code yesterday , and I’m wondering what does “Def” means , and how I can use it , I searched on Google but the answer wasn’t clear for me , so if anyone can help I will appreciate that , tysm everyone

[clever beacon]

@wide pond

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[worn mango]

Def is short for "define" and is used to define custom functions

[wide pond]

So where I can use it in codes?

Is it like checkpoints or something

I want example in coding

[worn mango]

a function is a block of code we can reuse so we don't need to repeat ourselves

it's like a variable but it's a series of commands

[wide pond]

So it’s like

While true:

[worn mango]

not quite

def say_hello():
    print("Welcome to the program!")

for example, we can define this

!e

def say_hello():
    print("Welcome to the program!")

[clever beacon]

:warning: Your 3.12 eval job has completed with return code 0.

[No output]

[worn mango]

if we were to run this, we can see "nothing" happens

that's because we've just told python what instructions to save for later. When we want to actually run the code inside function, we must "call" it

We "call" a function by typing the name of the function later in our code followed by ()

!e

def say_hello():
    print("Welcome to the program!")


say_hello()

[clever beacon]

:white_check_mark: Your 3.12 eval job has completed with return code 0.

Welcome to the program!

[wide pond]

Tysm , I think I understood , can I show you if what I learned is true or false?

[worn mango]

Sure

[wide pond]

def generate():
Print(“hello”)

generate()

So now whenever I say “generate” it will print hello?

[worn mango]

yes exactly

we can put a lot more than just a print inside the function block though

this is really useful to write complex code that we want to reuse later on

[royal heath]

Its also important to remember variables created in a function only exist in that function unless you "return" them

[worn mango]

it's not the variable that is returned. It's the data

[wide pond]

Alright , tysm sir , have a great day
And I really learned from you so much

!close

[clever beacon]

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