create the LEFT half of a triangle with * using only WHILE PYTHON

Question

I have this code:

    numero = int(input("Escriba el número de filas de la pirámide: "))
if numero > 0:
    patron = "+"
    contador = 1
    while contador <= numero:
        print( patron * contador )
        contador = contador + 1
else:
    print("El número de filas de la pirámide debe ser mayor que 0")

I need this triangle to reverse like that:

I have solved it with FOR but in this case I want to do it with the conditional WHILE, which would be needed in the code?

Asked By: Staryellow

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Source

Answer 1

You need to pad, for this you can add as many spaces as needed:

numero = int(input("Escriba el número de filas de la pirámide: "))
if numero > 0:
    patron = "+"
    contador = 1
    while contador <= numero:
        print(' '*(numero-contador) + patron * contador)  # changed here
        contador = contador + 1
else:
    print("El número de filas de la pirámide debe ser mayor que 0")

If you can use string methods (rjust), it’s even better:

print((patron * contador).rjust(numero))

output:

Escriba el número de filas de la pirámide: 6
     +
    ++
   +++
  ++++
 +++++
++++++

Answered By: mozway

create the LEFT half of a triangle with * using only WHILE PYTHON

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