print("Welcome To Use Python Service.") respond = input("Are you want to handle a transaction ?(Y/N):").upper() #validation of respond while respond != "Y" and respond != "N" :     print("Please enter 'Y' or 'N'")     respond = input("Are you want to handle a transaction ?(Y/N):").upper()      while respond == "Y":     holidaybonus = 0.03     extrabonus = 0.05     _pension = 0.04     print("Please fill in your personal information.")          name = input("Username:").upper() #validation of name     while not name.replace(" ","").isalpha() :         print("Invalid name.")         name = input("Username:").upper()          payment = input("Monthly payment:") #validation of payment     while not payment.replace(".","").isdigit():          print("Invalid input.Please digits only !")         payment = input("Monthly payment:")     payment = eval(payment)              public_holiday = input("Worked on public holiday(Y/N):").upper() #validation of public_holiday     while public_holiday != "Y" and public_holiday != "N" :         print("Invalid input.Please enter 'Y' or 'N'")         public_holiday = input("Worked on public holiday(Y/N):").upper()          hours = input("Total hours worked in a month:") #validation of hours     while not hours.replace(".","").isdigit():          print("Invalid input.Please digits only !")         hours = input("Total hours worked in a month:")     hours = eval(hours)          pension = input("Made payment of pension(Y/N):").upper() #validation of pension     while pension != "Y" and pension != "N" :         print("Please enter 'Y' or 'N'")         pension = input("Made payment of pension(Y/N):").upper()     if public_holiday == "Y":         total_1 = (payment * holidaybonus)     else:         total_1 = 0          if hours >= 160:         total_2 = (payment * extrabonus)     else:         total_2 = 0          if pension == "Y":         total_3 = (payment * _pension)     else:         total_3 = 0     net_pay = payment + total_1 + total_2 - total_3     total_addition = payment + total_1 + total_2          print("_" * 37)     print("PAYSLIP")     print("Company's name : TARUC SDN.BHD.")     print("Employee's name :",name)     print("Pay Period : NOV 2021")     print("_" * 37)     print("{0:<20s}{1:>1s}{2:>15s}{1:>1s}".format("Remuneration","|","Amount(RM)"))     print("{0:<20s}{1:>1s}{2:>15s}{1:>1s}".format("Monthly Payment","|",format(payment,',.2f')))     print("{0:<20s}{1:>1s}{2:>15s}{1:>1s}".format("Holiday Bonus","|",format(total_1,',.2f')))     print("{0:<20s}{1:>1s}{2:>15s}{1:>1s}".format("Extra Time Bonus","|",format(total_2,',.2f')))     print("-" * 37)     print("{0:<20s}{1:>1s}{2:>15s}{1:>1s}".format("Total Addition","|",format(total_addition,',.2f')))     print("-" * 37)     print("_" * 37)     print("{0:<20s}{1:>1s}{2:>15s}{1:>1s}".format("Deduction","|","Amount(RM)"))     print("{0:<20s}{1:>1s}{2:>15s}{1:>1s}".format("Pension Payment","|",format(total_3,',.2f')))     print("-" * 37)     print("{0:<20s}{1:>1s}{2:>15s}{1:>1s}".format("Total Deduction","|",format(total_3,',.2f')))     print("-" * 37)     print("_" * 37)     print("{0:<20s}{1:>1s}{2:>15s}{1:>1s}".format("Net Pay","|",format(net_pay,',.2f')))     print("_" * 37)     print("_" * 37)     respond = input("Is there another employee to handle a transaction ?(Y/N):").upper()     while respond != "Y" and respond != "N" :         print("Please enter 'Y' or 'N'")         respond = input("Is there another employee to handle a transaction ?(Y/N):").upper() if respond == "N":     print("Thank You For Using Python Service.")     show the flowchart of the programme above