How do you provide the user the choice to try my program once again like after typing yes , the user can use my program once again? : print ("Welcome to my Area Calculator")
i=raw_input("Please enter the shape whose Area you want to calculate(square/rectangle/right angled triangle/rhombus/parallelogram): ")
my_list=["square","rectangle","triangle","right angled triangle","rhombus","parallelogram"]
if i in my_list:
       if i=="square":
           s=float(input("What is the side of the square: "))
           print "Area of the square is : ", s**2
       elif i=="rectangle":
           l=float(input("What is the length of the rectangle: "))
           b=float(input("What is the breadth of the rectangle: "))
           print "Area of the rectangle is : ", l*b
       
       elif i=="right angled triangle":
           base1=float(input("What is the base of the triangle: "))
           height1=float(input("What is the height of the triangle: "))
           print "Area of the triangle is : ", 0.5*base1*height1
       elif i=="rhombus":
           d1=float(input("What is the length of the 1st diagnol of the rhombus: "))
           d2=float(input("What is the length of the 2nd diagnol of the rhombus: "))
           print "Area of the rhombus is : ", 0.5*d1*d2
       elif i=="parallelogram":
           base=float(input("What is the length of 1 side of the parallelogram: "))
           height=float(input("What is the length of the other side: "))
           print "Area of the parallelogram is : ", height*base
       print "Thank you so much for using my area calculator"