Try editing the code to make the Output say:

Need a hint?

Look at the words in quotes (aka strings): "..."

1

Hello there!

Great! Now make it say "Hello" to you (your name)

2

Hello Shelly!

The line you just edited "calls" the function printHello, using an argument ("your name").

def printHello(person):
   print("Hello " + person + "!")

printHello("Shelly")

To "define" (create) a function, we use the keyword def,

def printHello(person):
   print("Hello " + person + "!")

printHello("Shelly")

followed by the name of your function,

def printHello(person):
   print("Hello " + person + "!")

printHello("Shelly")

and any arguments it takes, in parentheses ( )

def printHello(person):
   print("Hello " + person + "!")

printHello("Shelly")

this line always ends with a colon

def printHello(person):
   print("Hello " + person + "!")

printHello("Shelly")

& the indented line(s) after the colon is what the function actually does when it's "called"

Remember: This is how you "call" the function

def printHello(person):
   print("Hello " + person + "!")

printHello("Shelly")

Let's change the name of the function, to whatever you want

3

Remember to change it in both places!

def whateverYouWant(person):
   print("Hello " + person + "!")

whateverYouWant("Shelly")

Let's change the name of the argument, too

4

Remember to change it in both places!

def whateverYouWant(x):
   print("Hello " + x + "!")

whateverYouWant("Shelly")

Now let's change the string that gets printed

5

def whateverYouWant(x):
   print("Whatever " + x + " wants")

whateverYouWant("Shelly")

Finally, let's call the function with a different argument:

6

def whateverYouWant(x):
   print("Whatever " + x + " wants!")

whateverYouWant("Moses")
Whatever Moses wants!

What if you want to call the function with two arguments?

Whatever ___ and ___ want.

Let's modify the function to take two arguments:

7

def whateverYouWant(person1, person2):
   print("Whatever " + person1 + " and " + person2 + " want.")

whateverYouWant("Shelly", "Moses")

Now let's use a shortcut to do the same thing - without all those plus signs!

8

def whateverYouWant(person1, person2):
   print("Whatever %s and %s want." %(person1, person2))

whateverYouWant("Shelly", "Moses")

This is called a formatter

What happens when you switch person1 and person2 in the formatter?

9

def whateverYouWant(person1, person2):
   print("Whatever %s and %s want." %(person2, person1))

whateverYouWant("Shelly", "Moses")

Then, what happens if you switch person1 and person2 in the argument list?

10

def whateverYouWant(person2, person1):
   print("Whatever %s and %s want." %(person2, person1))

whateverYouWant("Shelly", "Moses")

Write a function that takes three words as arguments, and prints a sentence containing all three words.

challenge:

Python Strings

By Michelle Lim

Python Strings

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