Python中While循环的语法错误

Question

我在第一个while循环那里遇到了语法错误，具体是在“Y”这个地方。

#Calculates trajectory under various angles
from math import*
from Density import*
from Fdrag import*
from pylab import title, xlabel, ylabel, show, plot, legend

#constants
rho0=1.2            #standard density of air at ground (kg/m^3)
g=9.81              #acceleration due to gravity (m/s/s)
T0=288.15           #ground temperature
D=0.1               #diameter (m)
A=pi*D^2/4          #Area
m=4                 #mass (kg)

for theta in (25, 50, 75):  #range of trajectories
    #initial conditions
    V=2800                  #velocity m/s
    Vx=V*cos(theta)         #horizontal velocity component
    Vy=V*sin(theta)         #vertical velocity component
    t=0                     #time
    dt=0.01                #time step (s)
    X=0                     #position
    Y=0.0                     #position
    x=[0]                    #position list (x component)
    y=[0]                    #position list (y component)
    vx=[Vx]                   #velocity list (x component)
    vy=[Vy]                   #velocity list (y component)
    T=[]                    #time list
    peaked=0                #use peakes as flag

    While Y>=0:
Then the rest of my code

Answer 1

在脚本最后的那一行While Y>=0:中，While应该改成小写的while（也就是小写的'w'）。

Answer 2

“while”这个词应该用小写字母写，也就是while。

Answer 3

while 这个词必须用小写的 'w' 来写，不然 Python 就认不出来了。