Equation Calculator.py

__author__ = 'Mark Arneman'

def promptInput():
    # Add Instructions

    equation = input('Enter your equation: ')
    return solveEquation(equation)

def validateInput(input):
    if input.find('x') == -1 or input.find('=') == -1:
        print('Invalid Equation \n')
        return promptInput()
    else:
        print('Valid Equation! \n')
        return True

def solveEquation(input):
    validateInput(input)

    # Solving equation logic here
    

    promptQuit()

def promptQuit():
    prompt = input('Solve another equation [Y/N]: ')

    if prompt.upper() == "Y":
        promptInput()
    elif prompt.upper() == 'N':
        exit()
    else:
        print('Invalid Input')
        promptQuit()

promptInput()