functions in python programming

1def myFunction(say): #you can add variables to the function
2  print(say)
3
4myFunction("Hello")
5
6age = input("How old are you?")
7
8myFunction("You are {} years old!".format(age))
9
10#this is what you get:
11
12Hello
13How old are you?
14>>11 #lol my real age actually
15You are 11 years old!

1def myFunction():
2  print('I am running in a function!')

1# first we have to write 'def'
2# then our function name followed by ()
3# and a ':' abd defining  block of code
4
5def multiply():     # naming convention could be same as variable for functions
6    product = 10.5 * 4
7    return product
8
9
10product = multiply()
11print(product)

1def nameOfFunction(something):
2  	return something
3

1#Statements with pound sign are comments, just to guide. They wont be executed.
2#Funtion Definition- Must include def
3def my_Function():
4#statements within a function, will be executed when the function is called
5    print("Hello World!")
6#Function Calling
7my_Function()

1def hello():
2  name = str(input("Enter your name: "))
3  if name:
4    print ("Hello " + str(name))
5  else:
6    print("Hello World") 
7  return 
8  
9hello()