How can I go back to a specific code line?

[caioneryfo]

Hi people,

I am new here and I have an issue with one of the exercises of a course I am taking.

Actually, it's not a problem with the exercise, but I want to do something different and can't seem to figure out the way to do it.

Here is the code:

# 28.08.2018 - Phyton Shape Area Calculator #

name = raw_input("Hello, What is your name? ")
print 'Hello ' + name
print 'Area calculator is running'

shape = raw_input("What shape do you want to input? Please enter C for Circle or T for Triangle ")


if shape == 'C':
 radius = float(raw_input("Insert the radius of the circle: "))
 areac = 3.14159 * radius**2
 print 'The area of your circle is ' + str(areac)
  
elif shape == 'T':
  base = float(raw_input('What is the base of the triangle? '))
  height = float(raw_input('What is the height of your triangle? '))
  areat = 0.5 * base * height
  print 'The area of your triangle is ' + str(areat)
  
else:
  print 'Are you stupid?'

I just want the program to go back to the "What shape do you want to input? Please enter C for Circle or T for Triangle " if the user end up inputing the wrong letter (any letter but the 'C' or 'T').

Can anyone help me?

Thanks.

[Mekire]

Look into while loops.

To make it simple wrap your input line in a while and break out of it if the user enters an acceptable input.