? Write to Files in C

In C, you can write data to files using the stdio.h library and file handling functions like fopen(), fprintf(), fputs(), and fwrite().

? Basic Steps to Write to a File

1. Include stdio.h

2. Use fopen() with "w" or "a" mode

3. Write using fprintf(), fputs(), or fwrite()

4. Close the file using fclose()

? Example: Write Text to a File

c
#include <stdio.h>int main() {    FILE *fptr;        // Open file in write mode (creates file if it doesn't exist)    fptr = fopen("example.txt", "w");    // Check if file was opened successfully    if (fptr == NULL) {        printf("Error opening file!\n");        return 1;    }    // Write to the file    fprintf(fptr, "Hello, world!\n");    fputs("Writing to files in C is easy!\n", fptr);    // Close the file    fclose(fptr);    printf("Data written to file successfully.\n");    return 0;}

? Modes in fopen()

? Tips

• Always check if the file opened successfully (if (fptr == NULL)).

• Don't forget to close the file after writing.