Simple Python program to calculate profit percentage

Filename: Profit.py  // written in Notepad

***********File begins here****************

// function definition

def findProfit():

    x = 'a'

    while x != 'n' or x != 'N':

        c = float(input("Enter current market price : "))

        s = float(input("Enter expected sell price : "))

        a = float((s - c)/c)*100

        formatted_a = "{:.2f}".format(a)

        print("% Profit for buy at " + str(c) + " and expected sell at " + str(s) + " would be : " + str(formatted_a) +"%") 

        print()   

        x= input("Want to continue (y/n) :") 

        if x == 'n':

            exit()

//call the function to execute it
findProfit()

***************File ends here**************

Outputs % profit upto 2 decimal points.