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The simple version of nextNumber shown in Segment 464 is
limited, because the numbers read cannot have either a sign or an exponent.
You can, however, compose fancier number-reading methods using peek
and next to read numbers character by character.
You need to know one trick to handle character-by-character reading. To
determine the digit associated with a character, you send the
digitValue message to that character, as in the following
illustration:
Workspace Transcript show: $5 printString; cr; show: $5 digitValue printString; cr Transcript $5 5