To convert a character to its ASCII numeric value in Java, you can use the charAt method of the String class and the intValue method of the Character class.
To convert an ASCII code (0-255) to its corresponding character in Java, you can use the char data type and cast the ASCII code to it.
To get the ASCII value of a character in Python, you can use the built-in ord() function.
To remove all non-printable characters in a string in PHP, you can use the preg_replace function with a regular expression pattern that matches non-printable characters.
This code opens the file "filename.txt" and reads it line by line. Each line is printed to the console until the end of the file is reached.