# Python Programming - Functions

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## Introduction: Python Programming - Functions

#Using functions

# Basic function that prints a statement
def hello():
print ("Hello world!")
# Call the function
hello()

print("===================")

# Function that returns a value
def whatispi():
return 3.14159
# Call the function
print ("Pi is:", whatispi() )

print("===================")

# Function that calculates using a formula
def area(length, width):
area = length * width
print ("The area is:", area)
# Call the function with arguments
area(9,8)

print("===================")

def areawithinfo(length, width):
area = length * width
print ("Length is:", length)
print ("Width is:", width)
print ("Total area is:", area)
# Call the function with arguments
areawithinfo(9,8)

print("===================")

# Function that returns a value
def areareturn(length, width):
area = length * width
return area
# Call a function with arguments.
# Then take the return value and place it into a variable
computerroom = areareturn (9,8)
print ("The area of the computer room is:", computerroom)

print ("================")
# Calling 2 functions

def roomarea(length, width):
area = length*width
return area

def roomvolume(area, height):
volume = area*height
return volume

area = roomarea(9,8)
finalvolume = roomvolume(area,10)
print ("The volume is: ", finalvolume)

print ("================")

# Function calling other functions
def callother(length, width):
hello()
whatispi()
area(length, width)

callother (9, 10)

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