PYTHON

python functions

def myFunction(say): #you can add variables to the function
  print(say)

myFunction("Hello")

age = input("How old are you?")

myFunction("You are {} years old!".format(age))

#this is what you get:

Hello
How old are you?
>>11 #lol my real age actually
You are 11 years old!

functions in python

#Letters, Nums,
#& underscores
#only, can't	=7  
#start w/ num	|		  _ 5 is the default value if no
# 	  |			|		 |  value is passed
#	  v         v        v
def funcName(param1, param2=5): #The colon terminates func header 
	str(param1) #Typecasting is temparary
    strVar = str(param1) # To make typecast perma, assign to var
    param1 = param2 # 5 is passed to param1 
    return param1 # 5 is returned
#	  ^      ^
#     |		 |_ return value is optional, if no return value, func 
  #Optional		will end returning to func call
  #return

x = funcName(7)
print(x) # prints 5

python functions

def function():
  print('This is a basic function')
  
function()
// Returns 'This is a basic function'

def add(numA, numB):
  print(numA+numB)
  
add(1,2)
// Returns 3

def define(value):
  return value

example = define('Lorem ipsum')
print(example)
// Returns 'Lorem ipsum'

python functions

# first we have to write 'def'
# then our function name followed by ()
# and a ':' abd defining  block of code

def multiply():     # naming convention could be same as variable for functions
    product = 10.5 * 4
    return product


product = multiply()
print(product)

functions python examples

def multiply(a, b):
  return a * b

print(multiply(4, 4))

how to define functions in python

def add(number):
  equation = 5 + number
  print(equation)
  
 
add(10)

output:
  
  15
  

functions in python

#Function Tutoral:
def hello():
  print("hello")
"""To make a function, it needs def then nameOfFunction() and a : to 
make the function work, you don't need a closing tag, as long as there is
tabbed section."""

def add(a, b): #This time, there is two inputs for the function to prossess. 
  c = a + b 
  return c
"""What the function above does is you input 2 numbers, and then it returns 
#The Value c, Calling it is as simple as add(5, 1) 
#What return does, is it almost makes a varible. So you can do:
#70 + add(10, 20) and it will return with: 100. This is because it will
go 70 + 30, as the function returned 30 because the inputs were 10 and 20."""

"""Functions can be called by code, as long as the function has already
been defined. Hope this helped you in your python journey!"""

python functions

def myfunction():{print(5), print(6)}

Python Functions

def my_function():
  print("Hello from a function")

my_function()

functions in python

#Functions
#Functions are followed by the 'def' keyword
#Name your function
def myfunc():
  a = 'This is a func'
  
#Calling the function  
myfunc()
print(myfunc())

python functions

#Functions
def string():
  print('This is a function')
  
  print(string())

functions in python programming

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

functions in python

# Functions

""" All the functions are followed by the 'def' keyword in python"""

def Greet(User): # The arguments inside the brackets should be called or the function gives you an error
  print("Hello" + User + "!")
  
# Calling the function

Greet("Shivram")

# Output: 'Hello Shivram !' 
  

python functions

#Inputs: x
#outputs: y
def my_function(x):
  y = 5*x
  return y

functions in python

def function():
  print("Hello there")
  
function()

function used in python

def hello():
  name = str(input("Enter your name: "))
  if name:
    print ("Hello " + str(name))
  else:
    print("Hello World") 
  return 
  
hello()

useful functions in python

# Python code to convert string to list

def Convert(string):
    li = list(string.split(" "))
    return li


# Driver code
'''
str1 = "Geeks for Geeks"
print(Convert(str1))
'''


def listToString(s):
    # initialize an empty string
    str1 = ""

    # traverse in the string
    for ele in s:
        str1 += ele +' '

        # return string
    return str1

'''

# Driver code    
s = ['Geeks', 'for', 'Geeks']
print(listToString(s))

'''

python functions

'''
Functions are very useful in python because you can use them instead
of repeating code in your program which makes your code messy.
'''

# This is how you create a function
def functionName():
  print('Hello World!')
  
functionName() # prints out 'Hello World!'
functionName() # prints out 'Hello World!' again

# Functions can have attributes which you insert into the function
def add(a, b):
  print(a + b)
  
add(2, 4) # prints out '6'
add(11, 35) # prints out '46'

# Finally, functions can return values which you can save as variables
def addFive(value):
  return value + 5

myVar = addFive(3) # myVar becomes equal to 8 (3 + 5)
print(myVar) # prints out myVar

'''
Keep in mind that scope comes into play in your functions. If you
create a variable in a function, it won't be saved outside the
function.
'''
def createVar():
	myVar = 5
    
createVar()
print(myVar) # returns error (unless you defined myVar outside function)