Example 1: 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!
Example 2: 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!"""
Example 3: python function arguments
#*args and **kwargs are normally used as arguments when calling the function.
#*args returns as tuple and **kwargs returns as dictionary.
#*args and **kwargs let you write functions with variable number of arguments in python.
def func(required,*args,**kwargs):
return f"{required} {args} {kwargs}"
func("Nagendra",5,32,2,1,23,) #output == 'Nagendra (5, 32, 2, 1, 23) {}'
func("Nagendra",5,32,2,1,23,key1="55",key2="75") #output == "Nagendra (5, 32, 2, 1, 23) {'key1': '55', 'key2': '75'}"
#Very understable example of args.
#Given n number of arguments in a function calculate its average
def average(*args):
'''
As we already know *args means collection of values in a tuple.
INPUT: arguments are given. example average(4,10,)
OUTPUT: average of two numbers (4+10)/2 == 14
'''
return sum(args)/len(args)
average(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15) #output == 8.0