谁能帮助我在此python代码中找到Cube

Question

x=3
y=x
ans=0

while( y != 0 ):
  ans = ans + x
  y = y - 1
ans = ans*x
print( str(ans) )

There is no output on screen. And no error is showing up. Just shown in image.

Answer 1

Your code only works for 3 cubed. You're also using multiplication. If you only want only addition as your comment implies, you'll probably want to break down your logic a bit. Here's how I'd do it (stop reading here and try to work it out yourself, first!):

def cube(x):
    """ Calculate x to the 3rd power (cube) """
    x_times_x = multiply(x, x)
    x2_times_x = multiply(x_times_x, x)
    return x2_times_x

def multiply(x, y):
    """ Multiplies two numbers only using addition """
    accum = 0
    for _ in range(y):
        accum += x
    return accum

print(cube(3))
print(cube(4))
print(cube(5))

Outputs:

27
64
125

as expected. Remember the easiest way to see output is to just save code to a file and run python from your command line.

Answer 2

Your syntax is all off.

You're using a capital X on the first line, then suddenly it's lowercase on the 2nd line.

while loops in python are generally written like this:

while y != 0 :