cadena = "carlos"
for i in range(len(cadena) - 1, -1, -1):
print(cadena[i])
n = int(input("ingrese un numero : "))
def factorial(n):
if (n==0):
return 1
else:
return n * factorial(n-1)
print("el factorial de " + str(n) + " es " + str(factorial(n)))
def fib(n):
a = 0
b = 1
for k in range (n):
c = a + b
a = b
b = c
return b
for x in range (20):
print (fib(x))