Therefore you need either a 386 or 486SX PC with a coprocessor fitted, or a 486DX or Pentium which have integral coprocessors. It is best run as a stand-alone program. The names of all variables are lower case, with capital letters separating words. Procedures will be identified by an initial capital. Where a constant is mentioned, this means an actual number or character set.
Values are the results of some operation.
A value may be a constant, but a constant may not be a value. The type of separator may affect the result of the operation. By contrast, when a value is expected, a string without quotation marks will be treated as a variable the current value of which is to be used. A complete instruction is identified by the placing of semicolons, not by the placing of commands on different lines. The coursebook will use the first of these formats, but this is a matter of personal choice and users may wish to develop their own style.