32 control codes (mainly to do with printing) 32 punctuation codes, symbols, and space 26 upper case letters 26 lower case letters numeric digits 0-9 We tend to say that the letter ‘A’ is the first ...
At each step, the programmer is able to see if, and how, a variable is affected. Trace tables are extremely useful because they enable a programmer to compare what the value of each variable should be ...
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