A student just sent me email with a question. But he got the problem number wrong. Is it too much to expect him to get right the problem number that he is asking about? So, I answered him telling him that problem #4 had nothing to do with ASCII codes. In case any of the rest of you have the same question (about Problem 3, not 4, by the way) see below. Dear Prof Patt Our names are *********** and *********** and our question deals with problem #4 on problem set #2. Should we put spaces between the indiviual ASCII codes or should it be one long string of letters? What is the norm of ACSII strings? If you look at Table E.2 in the book (page 514), you will see that "space" has its own ASCII code. ...as indeed you would expect. You can type a "?." You can also type a " " if you wish. In fact, normally we do that between words. The code is x00. So, if one wanted a space between two other characters, one would have to insert the x00. So, for example, the string (i.e., sequential list of characters) consisting of "Good student." would be written in ASCII as x476F6F640073747564656E742E. Note there are 13 ASCII codes. If the ASCII does not contain x00, there would be no space. Yale Patt Thanks alot ***********