Can you help me fix my code

Question

#Import Library
import sys

def main(): #Define main() function

# Declare variables
radius = 4
diameter = 2
height = 2
volume = 2

#Get input

# If inputting radius or diameter
decision = input("Enter \"r\" for radius or \"d\" for diameter: ")

# Get raidus or diameter
if decision == "r":
# Get radius
radius = int(input("Enter the radius: "))
elif decision == "d":
# Get Diameter
diameter = int(input("Enter the diameter: "))
raidus = (diameter / 2)
else:
print ("You entered an invalid answer. ")
sys.exit(0)

#Get the number right
height = int(input("Enter the height: "))

#Processing

#Caculate the Volume
volume = (3.14 * raidus * raidus * height)

#Output

# Print the Volume
print("The volume of the cylinder is", volume, "cubic units")

main() #call the main() function

Answer 1

There were some misspellings and missing indentation
https://code.sololearn.com/c9W8BtpFwqTz/?ref=app

Answer 2

I see strange indentations everywhere, in particular:
In the elif
Everything after the if-else loop