Titlebook: Beginning BASIC with the ZX Spectrum; Judith Miller Textbook 1985Latest edition Macmillan Publishers Limited 1985 BASIC.computer science.p

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How Near is the Bionic Future?,n order to do this the computer uses the command or keyword IF, found on key U, followed by the word THEN, on shifted key G. IF, like other commands, can be used only when the computer is in .; the cursor is a .. The command is simply saying that IF a certain statement is true THEN perform the next

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Macmillan Publishers Limited 1985

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Extracting parts of strings,s print all the characters from the first which is ‘a’ to the third which is ‘c’, so the result is ‘abc’. If there is only one number in the bracket, as in line 50, this means just print the character at that number, in this case the fourth which is ‘d’.

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https://doi.org/10.1007/978-3-031-31023-2The system is composed of three main parts as illustrated below:

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https://doi.org/10.1007/978-94-007-0653-8The whole sentence plus the number and the keyword PRINT appears at the top of the screen. The computer is now making a . by storing the information for later use.

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