fprintf() Function to Write Data to a File : C Programming Language Video Tutorial

Published: 21 December 2025
on channel: LearningLad

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In this video, we continue our C programming file handling tutorial series and focus on the fprintf() function.

The fprintf() function is used to write formatted data to files in C. It works similarly to the printf() function, but instead of displaying output on the terminal, it writes the output to a specified file stream.

🔹 Topics covered in this video:
What is the fprintf() function in C
Syntax of fprintf()
Writing text data to a file using fprintf()
Formatting output using format specifiers (%d, %s, etc.)
Understanding the return value of fprintf()
Writing formatted data to a file
Using fprintf() with stdout to display output on the terminal
Relationship between:
printf() and fprintf(stdout, ...)
scanf() and fscanf(stdin, ...)
Introduction to standard streams:
stdin
stdout
stderr

This video also demonstrates how to:
Open a file using fopen()
Check whether a file is opened successfully
Write data to a file
Verify file output by opening the file
Count the number of characters written using the return value of fprintf()

This tutorial is helpful for beginners learning C programming, especially those trying to understand file handling concepts clearly with examples.

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