n = 5

v0 = 5.0
g = 9.81

t_stop = 2*v0/g
dt = t_stop/n

print("First a for loop:")
for i in range(n+1):
    t = i*dt
    y = v0*t-0.5*g*t**2
    print('%4.2f %4.2f' %(t,y))

t = 0
eps = 1e-10

print("Then a while loop:")
while t < t_stop + eps:
    y = v0*t-0.5*g*t**2
    print('%4.2f %4.2f' %(t,y))
    t = t + dt


"""
Terminal> python ball_table1.py
First a for loop:
0.00 0.00
0.20 0.82
0.41 1.22
0.61 1.22
0.82 0.82
1.02 0.00
Then a while loop:
0.00 0.00
0.20 0.82
0.41 1.22
0.61 1.22
0.82 0.82
1.02 0.00
"""