Python File I/O: Count the number of lines in a text file

Last update on April 22 2025 12:50:06 (UTC/GMT +8 hours)

9. Line Count

Write a Python program to count the number of lines in a text file.

Contain of text.txt

What is Python language?                                                
Python is a widely used high-level, general-purpose, interpreted, dynamic programming language.Its design philosophy emphasizes code readability, and its syntax allows programmers to express concepts in fewer lines of code than possible in 
languages such as C++ or Java.                                         
Python supports multiple programming paradigms, including object-oriented, imperative and functional programming or procedural styles.It features a dynamic type system and automatic memory management and has a large and comprehensive standard library.The best way we learn anything is by practice and exercise questions. We  have started this section for those (beginner to intermediate) who are familiar with Python.

Sample Solution:-

Python Code:

def file_lengthy(fname):
        with open(fname) as f:
                for i, l in enumerate(f):
                        pass
        return i + 1
print("Number of lines in the file: ",file_lengthy("test.txt"))

Sample Output:

Number of lines in the file:  6

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to count the number of non-empty lines in a text file and print the count.
Write a Python program to count the total number of lines in a file and also count lines starting with a specified character.
Write a Python program to read a file, calculate the total line count, and compute the average line length.
Write a Python program to count the number of lines in a file using a generator expression and display the result.

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Python Code Editor:

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