Functions

#!/bin/python3

def who_am_i(): # Here we defined a fucntion without a parameter.
	name = 'Junaid' # name here is a local variable and will not be executed outside this funtion.
	age = 50
	print("My name is " + name + " and I am " + str(age) + " years old.")

who_am_i()



def add_one_hundred(num):
	print(num + 100)
add_one_hundred(100)



def add(x,y):
	print(x+y)
add(7,7)



def multiply(x,y):
	return x * y # used to execute the function but will not print 49. That means if we need that result later, we can recall it using print function like shown below.
(multiply(7,7)) # to print that, we need to use print function at the end. This is essential


def square_root(x):
	print(x ** .5)
	print(square_root)
square_root(64)


def nl(): # nl stands for new line.
	print('\n')
nl()