Definition - End of File (EOF) what does it mean? 
Definition - End of File (EOF) what does it mean? 

Eoferror in programming is a bug that appears quite a lot when using eof function. There are many types of Eof errors that development encounters. And one of the common errors is eoferror when reading a line. Let’s find a way to deal with this programming error.

Definition – End of File (EOF) what does it mean?

The EOF, known as End of file, is a function used to specify a file bookmark for the purpose of knowing the end of a file or data set.

Similar to the BOF (Beginning of File) tag, the EOF (End of File) demarcates certain types of data that are being run on a computer. Take, for example, a loop or iterative program when analyzing text at the end of a text file can recognize the EOF tag and stop performing activities when it reaches the end of the file.

In the early days of programming, some very simple syntax in programming was represented by the BOF and EOF marks which even represent most primitive computer systems. These types of tags and markers promote the idea of viewing the code as a simple translation from machine language to an accessible, linear programming language.

a = 1
a = 'Hello World'
= [1, 2, 3]
= [1.2, 'Hello', 'W', 2]

As mentioned above, the function of EOF helps to solve the issue of open-ended read/write or read operations. Without an EOF maker in a linear program, it might try to read through what is in the file which returns one of the errors. To avoid this, using a code check can help to check the EOF with each iteration in order to make sure that the execution ends at the end of the file, regardless of its length.

Definition - End of File (EOF) what does it mean? 
Definition – End of File (EOF) what does it mean?

EOFERROR in Python

With a Python code as follows:

while 1:

date=input("Example: April 21 | What is the date? ")

if date=="July 21":

    sd="23.5° North Latitude"

if date=="April 21" | date=="October 21":

    sd="0° Latitude"

if date=="Januảy 21":

    sd="23.5° South Latitude"

if sd:

    print sd

And here's what's going to happen:


Example: April 21 | What is the date? 

Traceback (most recent call last):

  File "C:\Users\Daniel\Desktop\Solar Declination", line 2, in <module>

    date=input("Example: April 21 | What is the date? ")

  File "<string>", line 0


SyntaxError: unexpected EOF while parsing


And here’s the solution for eoferror:

Use raw_inputthay instead of input

If you use input, then the data you enter is understood as Python Expression which means that you end up with knowing what kind of objects in your target variable and a series of exceptions can be made. So you shouldn’t use input since you’re putting something in for temporary testing, only used by people who know a little bit about python expressions.

raw_input always returns a string because that’s what you always enter into…but then you can easily convert it into the specific type you want and capture the specific exceptions that may occur. Hopefully with that explanation, there’s no need to argue to know which one you should use.

Note: This is only for Python 2 and Python 3, raw_input has become simple input and Python 2 input has been deleted.

In addition to that, there are a number of other issues in this program:

  • Use raw_inputkhi if you want to accept the chain as input. Input only receives Python expressions and it performs eval on them.
  • You are using certain 8 bit characters in your script such as 0°. You may need to identify encryption at the top of your script using #-*-coding:latin-1-*-line commonly known as coding-cookies.
  • Also, while making str() comparisons, standardize the strings and compare (those who use it lower (). This helps to reduce the flexibility in the input of the user’s data.

Sample code:

#-*- coding: latin1 -*-

while 1:

    date=raw_input("Example: March 21 | What is the date? ")

    if date.lower() == "march 21":

EOFERROR in Python
EOFERROR in Python

EOFERROR when reading a line in C

With C code as follows:

#include <stdio.h>

    /* count digits, white space, others */

main ()


  int c, i, nwhite, nother;

  int ndigit[10];

  nwhite = nother = 0;

  for (i = 0; i < 10; ++i)

    ndigit[i] = 0;

  while ((c = getchar ()) != EOF)

    if (c >= '0' && c <= '9')

      ++ndigit[c - '0'];

    else if (c == ' ' || c == '\n' || c == '\t')




  printf ("digits =");

  for (i = 0; i < 10; ++i)

    printf (" %d", ndigit[i]);

  printf (", white space = %d, other = %d\n", nwhite, nother);


Problem: When building it in Ubuntu, it begins to have characters but does not know how to end the program, as it does not end by entering ENTER, or returning the carriage. So, What does EOF mean? How can I activate it?

The solution:

What does EOF mean? How can I activate it? EOF means End-of-File.

“Activating the EOF” in this case means “making the program aware that no additional inputs will be sent.”

EOF is not a character, it is a macro used to evaluate the negative profitability of the input reading function. One can use Ctrl D to send eott itself that will force the function to return-1

In this case, since getchar() returns the negative number if no characters are read, the execution is terminated. But this doesn’t just apply to specific programs, it applies to many different tools.

In general, “EOF activation” can be done using the CTRL D key combination immediately after the last input discharge (that is, by sending an empty input).

For example with cat:

% cat >file # Hit ENTER

foo # Hit ENTER and CTRL+D


What happens under the hood when pressing CTRL D is that the input entered since the last input discharge is deleted; when this happens to be an empty input, the read building ()is called the STDIN return of program 0, getchar()returns a negative number (-1 in the GNU C library) and in turn it is understood as EOF.

EOFERROR when reading a line in C
EOFERROR when reading a line in C

Above are the ways to fix eoferror in Python and C. In fact, every programming language has the same errors. Hope the content above is helpful to you.


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