
42 ◾ Computational Thinking for the Modern Problem Solver
to represent the letter Q are each dierent, they nonetheless each represent
the same thing: the letter Q.
Textual characters are usually encoded as integer values using the encod-
ing schemes discussed earlier in this chapter. Each number is arbitrarily asso-
ciated with the image that should be used when the character is drawn on a
page or shown on the computer screen. e associations between numbers
and text are known collectively as a character encoding scheme. e most
common character encoding scheme is the ASCII table, shown in Figure2.17,
which denes associations between n ...