Escape Sequences for Non-Printable ASCII Characters

∟Escape Sequences for Non-Printable ASCII Characters

This section describes escape sequences for non-printable ASCII characters in 'string' literals.

The following escape sequences need to be supported to allow us to enter non-printable characters in string literals:

If \ is followed by n ("\n"), the escape sequence represents the new-line character.
If \ is followed by r ("\r"), the escape sequence represents the carriage-return character.
If \ is followed by t ("\t"), the escape sequence represents the tab character.
If \ is followed by x.., where .. are 2 hexadecimal digits, the escape sequence represents the ASCII character defined by the byte value of the 2 hexadecimal digits. For example, "\x07" represents the character that generates a beep on terminals.

Both upper case and lower case of hexadecimal digits are supported.

Examples of "string" literals with escape sequences for non-printable ASCII characters:

write("Leave a message after the beep: \x07.");

write("Backspace key to remove letter A\x08."); 

write("What is the null character \x00 for?"); 

write("\x0a is the same as \n."); 

write("\x0A is the same as \n.");