Can't convert a number to a float

问题

I'm trying to solve a homework problem as an extreme novice to python, and I don't understand what I'm doing wrong. I have the code and error message below, hoping that someone can tell me where I went wrong.

The miles input tries 10, 50, then 100. Which works. Mpg is 20.0. Also works. gp input is 3.1599, which gives me this error. Not sure why.

miles = float(input())  
mpg = float(input())
gp = float(input())
price = (miles*1.0/mpg)*gp
print(price)

Traceback (most recent call last): File "main.py", line 3, in gp = float(input()) EOFError: EOF when reading a line

回答1:

Works fine for me. See below:

Output

回答2:

EOF error results usually in an online compiler when an input is given by the system but the input reading line is not at the right place to read it. Read the sample input syntax again and try. or give input inside code.

you can use try catch block for solve this problem please check below code:

in your code you did not took miles as int in line 1 but you try to multiply it with float in line 6.

try:
  miles = float(input())   
  print('Enter miles per gallon:')
  mpg = float(input())
  print('Enter the gas price:')
  gp = float(input())
  price = (miles*1.0/mpg)*gp  
  print(price)
except:
  pass

回答3:

`mpg = float(input('Enter miles per gallon:'))
 gp = float(input('Enter the gas price:'))
 price = (10*1.0/mpg)*gp print(price) 
 price = (50*1.0/mpg)*gp print(price) 
 price = (400*1.0/mpg)*gp print(price)`

This was the answer, solved

来源：https://stackoverflow.com/questions/58105356/cant-convert-a-number-to-a-float

标签

python

input

int