Unit VIII - Programming (IGCSE) -key terms

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variable

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a named data store that contains a value that may change during the execution of a program

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constant

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a named data store that contains a value that does not change during the execution of a program

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declare

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define the value and data type of a variable or constant

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integer

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a positive or negative whole number that can be used with mathematical operators

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real number

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a positive or negative number with a fractional part; Real numbers can be used with mathematical operators

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char

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a variable or constant that is a single character

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string

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a variable or constant that is several characters in length. Strings vary in length and may even have no characters (an empty string); the characters can be letters and/or digits and/or any other printable symbol

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sequence

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the order in which the steps in a program are executed

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selection

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allowing the selection of different paths through the steps of a program

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iteration

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a section of programming code that can be repeated under certain conditions