A file consisting of characters from the ASCII character code set. Text files (also know an ASCII text files) contain character data. When we create a text file we usually think of it consisting of a ...A file consisting of characters from the ASCII character code set. Text files (also know an ASCII text files) contain character data. When we create a text file we usually think of it consisting of a series of lines. On each line are several characters (including spaces, punctuation, etc.) and we generally end the line with a return (this a character within the ASCII character code set).