sajidPython

import math
from math import sin
from math import pi as n

print(" Welcome to Refraction Calculator!       ")
print("    Created by:Sajid Ul Islam    ")
print("   ===========================================       ")


def refraction_calculator():
    print('What do you want to find?)')
    print("1.Snel's law\n2.Relative refraction")
    user_input1 = input('Your answer:')
    if user_input1 == '1':
        print('What do you want to find?')
        print('1.Sin1\n2.Sin2\n3.n1\n4.n2')
        user_input = input('Your answer:')

        if user_input == "1":
            Sin2 = float(input('Enter the value of Sin2:')) * n / 180
            b = math.sin(Sin2)
            n1 = float(input('Enter the value of n1:'))
            n2 = float(input('Enter the value of n2:'))
            Result = ((b / n2) * n1)
            print("Sin1:", Result)

        elif user_input == "2":
            Sin1 = float(input('Enter the value of Sin1:')) * n / 180
            b = math.sin(Sin1)
            n1 = float(input('Enter the value of n1:'))
            n2 = float(input('Enter the value of n2:'))
            Result = ((b * n1) / n2)
            print('Sin2:', Result)


        elif user_input == '3':
            Sin1 = float(input('Enter the value of Sin1:')) * n / 180
            b = math.sin(Sin1)
            Sin2 = float(input('Enter the value of Sin2:')) * n / 180
            c = math.sin(Sin2)
            n2 = float(input('Enter the value of n2:'))
            Result = ((c * n2) / b)
            print('n1:', Result)

        elif user_input == '4':
            Sin1 = float(input('Enter the value of Sin1:')) * n / 180
            b = math.sin(Sin1)
            Sin2 = float(input('Enter the value of Sin2:')) * n / 180
            c = math.sin(Sin2)
            n1 = float(input('Enter the value of n1:'))
            Result = ((b * n1) / c)
            print('n2:', Result)

    if user_input1 == '2':
        print('Which relative refraction do you want to find?')

        print('1.n1/n2 \n2.n2/n1')
        user_input = input('Your answer:')

        list2 = [1.00, 1.00029, 1.33, 1.52, 2.42]

        if user_input == '1':
            print('1.Zero\n2.Air\n3.Water\n4.Glass\n5.Diamond')
            n1 = str(input('Enter the number of the name of n1:'))

            if n1 == '1':
                r1 = list2[0]
                print("Refraction value:", r1)

            elif n1 == '2':
                r1 = list2[1]
                print("Refraction value:", r1)
            elif n1 == '3':
                r1 = list2[2]
                print("Refraction value:", r1)
            elif n1 == '4':
                r1 = list2[3]
                print("Refraction value:", r1)
            elif n1 == '5':
                r1 = list2[4]
                print("Refraction value:", r1)

            n2 = str(input('Enter the number of the name of n2:'))
            if n2 == '1':
                r2 = list2[0]
                print('Reflection value:', r2)

            if n2 == '2':
                r2 = list2[1]
                print("Refraction value:", r2)
            elif n2 == '3':
                r2 = list2[2]
                print("Refraction value:", r2)
            elif n2 == '4':
                r2 = list2[3]
                print("Refraction value:", r2)
            elif n2 == '5':
                r2 = list2[4]
                print("Refraction value:", r2)

            s = r1 / r2
            print('n1/n2:', s)

        if user_input == '2':
            print('1.Zero\n2.Air\n3.Water\n4.Glass\n5.Diamond')

            n1 = str(input('Enter the number of the name of n1:'))

            if n1 == '1':
                r1 = list2[0]
                print("Refraction value:", r1)

            elif n1 == '2':
                r1 = list2[1]
                print("Refraction value:", r1)
            elif n1 == '3':
                r1 = list2[2]
                print("Refraction value:", r1)
            elif n1 == '4':
                r1 = list2[3]
                print("Refraction value:", r1)
            elif n1 == '5':
                r1 = list2[4]
                print("Refraction value:", r1)

            n2 = str(input('Enter the number of the name of n2:'))
            if n2 == '1':
                r2 = list2[0]
                print('Reflection value:', r2)

            if n2 == '2':
                r2 = list2[1]
                print("Refraction value:", r2)
            elif n2 == '3':
                r2 = list2[2]
                print("Refraction value:", r2)
            elif n2 == '4':
                r2 = list2[3]
                print("Refraction value:", r2)
            elif n2 == '5':
                r2 = list2[4]
                print("Refraction value:", r2)
            s = r2 / r1
            print("n2/n1:", s)


def run():
    print("Welcome to my refraction calculator:)")
    refraction_calculator()
    while True:
        y_or_n = input("\nWould you like to try again?\nYour command(y/n):")
        if y_o