从Python程序4-9开始

Question

我正试图弄清楚如何使用for语句设计一个计数控制的循环。我已经完美地复制了文本中的示例程序(或者我是这么认为的(。我试着运行这个程序，但一直遇到语法错误。有人能告诉我我做错了什么吗？

# This program converts the speeds 60 kph
# through 130 kph (in 10 kph increments)
# to mph.
START_SPEED = 60            # Starting speed
END_SPEED = 131             # Ending speed
INCREMENT = 10              # Speed increment
CONVERSION_FACTOR = 0.6214  # Conversion factor
# Print the table headings.
print('KPHtMPH')
print('--------------')
# Print the speeds.
for kph in range(START_SPEED, END_SPEED, INCREMENT)
mph = kph * CONVERSION_FACTOR
print(kph, 't', format(mph, '.1f'))

Answer 1

您缺少:

...
for kph in range(START_SPEED, END_SPEED, INCREMENT):
mph = kph * CONVERSION_FACTOR
...

使用:

我得到

KPH MPH
--------------
60   37.3
70   43.5
80   49.7
90   55.9
100      62.1
110      68.4
120      74.6
130      80.8