Simple calculator using Python

[Suthankan1]

` History=[] while True: print("Select operation.") print("1.Add : + ") print("2.Subtract : - ") print("3.Multiply : * ") print("4.Divide : / ") print("5.Power : ^ ") print("6.Remainder: % ") print("7.Terminate: # ") print("8.Reset : $ ") print("8.History : ? ")

take input from the user

choice = input("Enter choice(+,-,*,/,^,%,#,$,?): ") print(choice) if choice=="#":

program ends here

print("Done. Terminating")
exit()

else:

  if choice=="+":
     num1=input()
     print("Enter first number:",num1)
     if num1=="0$":
             continue
     if num1=="#":
         print("Done. Terminating")
         exit()
     num2=input()
     print("Enter second number:",num2)
     if num2=="0$":
             continue
     if num2=="#":
         print("Done. Terminating")
         exit()
     p=float(num1)+float(num2)
     print(float(num1),choice,float(num2),"=",float(p))
     new=float(num1),choice,float(num2),"=",float(p)
     x1=new[0]
     x2=new[1]
     x3=new[2]
     x4=new[3]
     x5=new[4]
     History.append(str(x1)+" "+str(x2)+" "+str(x3)+" "+str(x4)+" "+str(x5))

  if choice=="-":
     num1=input()
     print("Enter first number:",num1)
     if num1=="0$":
             continue
     if num1=="#":
         print("Done. Terminating")
         exit()
     num2=input()
     print("Enter second number:",num2)
     if num2=="0$":
             continue
     if num2=="#":
         print("Done. Terminating")
         exit()
     p=float(num1)-float(num2)
     print(float(num1),choice,float(num2),"=",float(p))
     new=float(num1),choice,float(num2),"=",float(p)
     x1=new[0]
     x2=new[1]
     x3=new[2]
     x4=new[3]
     x5=new[4]
     History.append(str(x1)+" "+str(x2)+" "+str(x3)+" "+str(x4)+" "+str(x5))
  if choice=="*":
     num1=float(input())
     print("Enter first number:",num1)
     if num1=="0$":
             continue
     if num1=="#":
         print("Done. Terminating")
         exit()
     num2=float(input())
     print("Enter second number:",num2)
     if num2=="0$":
             continue
     if num2=="#":
         print("Done. Terminating")
         exit()
     p=float(num1)*float(num2)
     print(float(num1),choice,float(num2),"=",float(p))
     new=float(num1),choice,float(num2),"=",float(p)
     x1=new[0]
     x2=new[1]
     x3=new[2]
     x4=new[3]
     x5=new[4]
     History.append(str(x1)+" "+str(x2)+" "+str(x3)+" "+str(x4)+" "+str(x5))
  if choice=="/":
     num1=input()
     print("Enter first number:",num1)
     if num1=="0$":
             continue
     num2=input()
     print("Enter second number:",num2)
     if num2=="0":
         print("float division by zero")
         print(float(num1),"/",float(num2),"= None")
         new=float(num1),"/",float(num2),"= None"
         new=float(num1),choice,float(num2),"=","None"
         x1=new[0]
         x2=new[1]
         x3=new[2]
         x4=new[3]
         x5=new[4]
         History.append(str(x1)+" "+str(x2)+" "+str(x3)+" "+str(x4)+" "+str(x5))
     else:
         if num2=="0$":
             continue
         else:
              p=float(num1)/float(num2)
              print(float(num1),choice,float(num2),"=",p)
              new=float(num1),choice,float(num2),"=",p
              new=float(num1),choice,float(num2),"=",float(p)
              x1=new[0]
              x2=new[1]
              x3=new[2]
              x4=new[3]
              x5=new[4]
              History.append(str(x1)+" "+str(x2)+" "+str(x3)+" "+str(x4)+" "+str(x5))

  if choice=="^":
     num1=float(input())
     print("Enter first number:",num1)
     if num1=="0$":
             continue
     if num1=="#":
         print("Done. Terminating")
         exit()
     num2=float(input())
     print("Enter second number:",num2)
     if num2=="0$":
             continue
     if num2=="#":
         print("Done. Terminating")
         exit()
     p=float(num1)^float(num2)
     print(float(num1),choice,float(num2),"=",float(p))
     new=float(num1),choice,float(num2),"=",float(p)
     x1=new[0]
     x2=new[1]
     x3=new[2]
     x4=new[3]
     x5=new[4]
     History.append(str(x1)+" "+str(x2)+" "+str(x3)+" "+str(x4)+" "+str(x5))

  if choice=="%":
     num1=float(input())
     print("Enter first number:",num1)
     if num1=="0$":
             continue
     if num1=="#":
         print("Done. Terminating")
         exit()
     num2=float(input())
     print("Enter second number:",num2)
     if num2=="0$":
             continue
     if num2=="#":
         print("Done. Terminating")
         exit()
     p=float(num1)%float(num2)
     print(float(num1),choice,float(num2),"=",float(p))
     new=float(num1),choice,float(num2),"=",float(p)
     x1=new[0]
     x2=new[1]
     x3=new[2]
     x4=new[3]
     x5=new[4]
     History.append(str(x1)+" "+str(x2)+" "+str(x3)+" "+str(x4)+" "+str(x5))

  if choice=="?":
      if History==[]:
        print("No past calculations to show")
      else:
           for i in History:
                print(i)

   `