I'm trying to make this program in Python which asks for the surface area and volume of a cylinder. At the end, it asks the user if it wants to calculate volume/surface area. However, if they do type in Yes, nothing happens. What is wrong with my code?
Secondly, I tries using math.pi but it didn't work, what should I do.
The code is long so only scroll down to the important parts:
print("Welcome to the volume and surface area cylinder calculator powered by Python!")
response = input("To calculate the volume type in 'vol', to calculate the surface area, type in 'SA': ")
if response=="vol" or response =="SA":
pass
else:
print("Please enter a correct statement.")
response = input("To calculate the volume type in 'vol', to calculate the surface area, type in 'SA': ")
if response=="vol":
#Below splits
radius, height = [float(part) for part in input("What is the radius and height of the cylinder? (e.g. 32, 15): ").split(',')]
PI = 3.141592653589793238462643383279502884197169399375105820974944592307816406286
volume = PI*radius*radius*height
decimal_places = int(input("How many decimal places do you want it to?: "))
print("The volume of the cylinder is {0:.{1}f}cm\u00b3".format(volume, decimal_places))
verify = input("Do you want to find out the surface area (type in Yes or No): ")
verify = verify.capitalize
if verify == "Yes":
radius, height = [float(part) for part in input("What is the radius and height of the cylinder? (e.g. 32, 15): ").split(',')]
PI = 3.141592653589793238462643383279502884197169399375105820974944592307816406286
SA = int(2)*PI*radius*radius+int(2)+radius*radius*height
decimal_places = int(input("How many decimal places do you want it to?: "))
print("The surface area of the cylinder is {0:.{1}f}cm\u00b2".format(SA, decimal_places))
if verify == "No":
pass
if response =="SA":
#Below splits
radius, height = [float(part) for part in input("What is the radius and height of the cylinder? (e.g. 32, 15): ").split(',')]
PI = 3.141592653589793238462643383279502884197169399375105820974944592307816406286
SA = int(2)*PI*radius*radius+int(2)+radius*radius*height
decimal_places = int(input("How many decimal places do you want it to?: "))
print("The surface area of the cylinder is {0:.{1}f}cm\u00b2".format(SA, decimal_places))
verify = input("Do you want to find out the volume (type in Yes or No): ")
verify = verify.capitalize
if verify == "Yes":
radius, height = [float(part) for part in input("What is the radius and height of the cylinder? (e.g. 32, 15): ").split(',')]
PI = 3.141592653589793238462643383279502884197169399375105820974944592307816406286
volume = PI*radius*radius*height
decimal_places = int(input("How many decimal places do you want it to?: "))
print("The volume of the cylinder is {0:.{1}f}cm\u00b3".format(volume, decimal_places))
if verify == "No":
pass
You replaced verify
with a method :
verify = verify.capitalize
This'll never match either 'Yes'
or 'No'
because it is no longer a string. Call the method instead:
verify = verify.capitalize()
Note that your test for "No"
can just be dropped, there is little point in testing for a string then just pass
ing.
Using math.pi
instead of PI
otherwise works just fine:
>>> import math
>>> math.pi
3.141592653589793
>>> radius, height = 32, 15
>>> 2 * math.pi * radius ** 2 + 2 * math.pi * radius * height
9449.910701998098
>>> math.pi * radius ** 2 * height
48254.86315913922
This is my tweaked version. It avoids a lot of repetition.
from math import pi
print("Welcome to the volume and surface area cylinder calculator powered by Python!")
response = raw_input("To calculate the volume type in 'vol', to calculate the surface area, type in 'SA': ").lower()
while response not in ["vol", "sa"]:
print("Please enter a correct statement.")
response = raw_input("To calculate the volume type in 'vol', to calculate the surface area, type in 'SA': ").lower()
radius, height = [float(part) for part in raw_input("What is the radius and height of the cylinder? (e.g. 32, 15): ").split(',')]
r2 = radius ** 2
SA = 2 * pi * r2 + 2 + pi * radius * height
volume = pi * r2 * height
decimal_places = int(raw_input("How many decimal places do you want it to?: "))
if response=="vol":
print("The volume of the cylinder is {0:.{1}f}cm\u00b3".format(volume, decimal_places))
verify = raw_input("Do you want to find out the surface area (type in Yes or No): ")
if verify.lower() == "yes":
print("The surface area of the cylinder is {0:.{1}f}cm\u00b2".format(SA, decimal_places))
if response =="sa":
print("The surface area of the cylinder is {0:.{1}f}cm\u00b2".format(SA, decimal_places))
verify = raw_input("Do you want to find out the volume (type in Yes or No): ")
if verify.lower() == "yes":
print("The volume of the cylinder is {0:.{1}f}cm\u00b3".format(volume, decimal_places))
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