书本练习题4print函数使用

 space_in_a_car 中的 _ 是 下划线(underscore) 字符。你要自己学会怎样打出这个字符来。

这个符号在变量里通常被用作假想的空格，用来隔开单词。

cars = 100
space_in_a_car = 4.0
drivers = 30
passengers = 90
cars_not_driven = cars - drivers
cars_driven = drivers
carpool_capacity = cars_driven * space_in_a_car
average_passengers_per_car = passengers / cars_driven

print("There are",cars,'cars available.')
print('There are only',drivers,'driver available.')
print('There will be',cars_not_driven,'empty cars today.')
print('We can transport', carpool_capacity,'people today.')
print('We have',passengers,'to carpool today.')
print ('We need to put about',average_passengers_per_car,'in each car.')
输出结果如下：

There are 100 cars available.
There are only 30 driver available.
There will be 70 empty cars today.
We can transport 120.0 people today.
We have 90 to carpool today.
We need to put about 3.0 in each car.