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Start your free trial###### Greg Isaacson

Courses Plus Student 702 Points# I Dont understand the question

Hi Guys!

I just did the previous tutorial and I understand everything fine!!

But now I get this question and I dont get it...

The question is asking for me to create a function that will select a random number...

so I create my function like this:

def random_item(): random.randint ()

so this selects a random integer...

then what? How do I minus one from it??

It says :

"get a random number between 0 and the length of the iterable, minus one"

I dont understand... "And the length of the iterable, minus one" I must do what, get a random number AND get the length of the iterable minus one????

```
import random
def random_item():
random.randint()
# EXAMPLE
# random_item("Treehouse")
# The randomly selected number is 4.
# The return value would be "h"
```

###### Greg Isaacson

Courses Plus Student 702 PointsSo I have adjusted it so it works like this:

```
import random
def random_item(treehouse):
Randomnumber = random.randint(0, len(treehouse) - 1)
return(Randomnumber)
print(???)
()
```

## 2 Answers

###### Vedran Linić

Courses Plus Student 18,802 Points```
import random
def random_item(str):
len_of_str = len(str) # you get lenght of string
rand_los = random.randint(0, len_of_str) # you get number between 0 and lenght of string
rand_los -=1 # you take 1 from that number
return str[rand_los] # you get letter in the place of that string
```

###### Greg Isaacson

Courses Plus Student 702 PointsOk I understand it now!:)

It was using [] that threw me off.

To explain my answer and understanding:

import random ------ This imports the random library.

Create my function:

Def random_item(treehouse): return treehouse[] <<<<< These [] brackets I understand now will return the "letter" based of the random integer.

So it goes like this:

return treehouse[random.randint(0,len(treehouse)-1)]

## Greg Isaacson

Courses Plus Student 702 Points## Greg Isaacson

Courses Plus Student 702 PointsI have done this...

am I on the right track..

``` import random def random_item(treehouse): Randomnumber = random.randint() return Randomnumber - 1 print(Randomnumber) ()