英文:
When I run my code, nothing is returned, yet there are no errors and I called to the methods
问题
我调用了所有的方法，所以我不确定为什么它们不会返回任何值？
这是我的尝试：
train_mass = 22680
train_acceleration = 10
bomb_mass = 1
def f_to_c(f_temp):
c_temp = (f_temp - 32) * 5/9
return c_temp
f100_in_celsius = f_to_c(100)
def c_to_f(c_temp):
f_temp = c_temp * (9/5) +32
return f_temp
c0_in_fahrenheit = c_to_f(0)
def get_force(mass, acceleration):
return mass*acceleration
train_force = get_force(train_mass, train_acceleration)
def get_energy(mass, c=3*10**8):
return mass * c**2
bomb_energy = get_energy(bomb_mass)
英文:
I called all the methods so I'm not sure why they won't return anything?
this is my attempt:
train_mass = 22680
train_acceleration = 10
bomb_mass = 1
def f_to_c(f_temp):
c_temp = (f_temp - 32) * 5/9
return c_temp
f100_in_celsius = f_to_c(100)
def c_to_f(c_temp):
f_temp = c_temp * (9/5) +32
return f_temp
c0_in_fahrenheight = c_to_f(0)
def get_force(mass, acceleration):
return mass*acceleration
train_force = get_force(train_mass, train_acceleration)
def get_energy(mass, c=3*10**8):
return mass * c**2
bomb_energy = get_energy(bomb_mass)
I was expecting the values in the method to be returned but nothing gets returned. Also, there were no errors.
答案1
得分: 1
> ## 在Python中的打印与返回
>
> 打印（print）和返回（return）是完全不同的概念。
>
> print 是一个你调用的函数。调用 print 会立即让你的程序输出文本，供人类查看。当你想向人显示一个值时，请使用 print。
>
> return 是一个关键字。当到达 return 语句时，Python 将停止当前函数的执行，并将一个值发送到调用函数的地方。当你想要从代码的一个地方发送一个值到另一个地方时，请使用 return。
>
> 使用 return 会改变程序的流程。使用 print 则不会。
英文:
From Python Principles:
> ## Print vs. return in Python
>
> Printing and returning are completely different concepts.
>
> print is a function you call. Calling print will immediately make your
> program write out text for you to see. Use print when you want to show
> a value to a human.
>
> return is a keyword. When a return statement is reached, Python will
> stop the execution of the current function, sending a value out to
> where the function was called. Use return when you want to send a
> value from one point in your code to another.
>
> Using return changes the flow of the program. Using print does not.
答案2
得分: 0
如上所述，请使用打印语句：
train_mass = 22680
train_acceleration = 10
bomb_mass = 1
def f_to_c(f_temp):
c_temp = (f_temp - 32) * 5/9
return c_temp
f100_in_celsius = f_to_c(100)
print(f100_in_celsius)
def c_to_f(c_temp):
f_temp = c_temp * (9/5) +32
return f_temp
c0_in_fahrenheit = c_to_f(0)
print(c0_in_fahrenheit)
def get_force(mass, acceleration):
return mass * acceleration
train_force = get_force(train_mass, train_acceleration)
print(train_force)
def get_energy(mass, c=3*10**8):
return mass * c**2
bomb_energy = get_energy(bomb_mass)
print(bomb_energy)
英文:
As mentioned above, use print statements:
train_mass = 22680
train_acceleration = 10
bomb_mass = 1
def f_to_c(f_temp):
c_temp = (f_temp - 32) * 5/9
return c_temp
f100_in_celsius = f_to_c(100)
print(f100_in_celsius)
def c_to_f(c_temp):
f_temp = c_temp * (9/5) +32
return f_temp
c0_in_fahrenheit = c_to_f(0)
print(c0_in_fahrenheit)
def get_force(mass, acceleration):
return mass * acceleration
train_force = get_force(train_mass, train_acceleration)
print(train_force)
def get_energy(mass, c=3*10**8):
return mass * c**2
bomb_energy = get_energy(bomb_mass)
print(bomb_energy)
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