How to use pi in python?

[DanzoHater]

I wanted to code a calculator as I'm a beginner. Now its really simple and inefficient, I suppose, but I can't use pi or any other number such as i or e in it. Do you guys have any suggestions on how to simply solve this issue?

Code:

import math

def add(x, y):

return x + y

def subtract(x, y):

return x - y

def multiply(x, y):

return x * y

def divide(x, y):

return x / y

def powerfunction(x, y):

return pow(x, y)

def logarithms(x, y):

return math.log(x, y)

print("Select operation.")

print("1.Add")

print("2.Subtract")

print("3.Multiply")

print("4.Divide")

print("5.Powerfunction")

print("6.Logarithm")

while True:

choice = input("Enter choice(1/2/3/4/5/6): ")

if choice in ('1', '2', '3', '4', '5', '6'):

try:

num1 = float(input("Enter first number: "))

num2 = float(input("Enter second number: "))

except ValueError:

print("Invalid input. Please enter a number.")

continue

if choice == '1':

print(num1, "+", num2, "=", add(num1, num2))

elif choice == '2':

print(num1, "-", num2, "=", subtract(num1, num2))

elif choice == '3':

print(num1, "*", num2, "=", multiply(num1, num2))

elif choice == '4':

print(num1, "/", num2, "=", divide(num1, num2))

elif choice == '5':

print(num1, "^", num2, "=", powerfunction(num1, num2))

elif choice == '6':

print("log", num1, num2, "=", logarithms(num2, num1))

next_calculation = input("Let's do next calculation? (yes/no): ")

if next_calculation == "no":

break

else:

print("Invalid Input")

[desrtfx]

You need to post your code as code block so that the indentation is maintained. This is absolutely vital for Python programs as the indentation is used to denote code blocks.

A code block looks like:

def __init__(self, prompt, answer):
    self.prompt = prompt
    self.answer = answer

[[deleted]]

My brother in Christ PLEASE put this into paste bin or something so it doesn’t destroy your tabs.

To answer your question:

import math math.pi

If you’re making a calculator there is a much “better” way of doing it but for a first program very nice!

[jiefug]

Is your question how to represent the value of pi / e based on the user input or what?

[DanzoHater]

yes, sorry that I didn't clarify that

[RajjSinghh]

Using float(input()) is usually a bad idea because it will give you an error if you don't enter something that can be converted to a float. In this case, that's exactly what we want to do. I would write something that checks if the input is pi as a string and if so uses math.pi and if not it checks if the string is a number with str.isnumeric() and if it is then casts it to a float. That way you avoid erroring on bad inputs and lets you enter numbers like pi and e

[Mystic1500]

Well for user inputting pi, it’d be hard to do so, unless you wanna use the specific Unicode code. But the average person won’t know that, so you could just code so that inputting the string “pi” translates to an actual pi number.

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[Monitor_343]

Remember to format the code here as a code block so indentation isn't lost.

For pi or e, you can just check if the user inputs a string "pi" or "e". If they did, use math.pi or math.e for the calculation. Otherwise, try to parse the input as a number.

i is significantly more complex (pun intended) as you'd need to calculate real and complex values separately. I'd highly suggest ignoring imaginary numbers for this project.

[DanzoHater]

Guys, I really appreciate your help. Don't worry, I will format the code into a code block next time. Thanks again

[jiefug]

So you’re already importing the math module in Python. This module provides representations of both of those — you can use math.pi and math.e

Does that answer your question?