String Expression |
An expression that evaluates to a string. The syntax is:
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Item
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Description
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literal
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A string constant composed of any characters available on the keyboard, including those generated with the ANY CHAR key
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string variable name
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The name of a string variable or the name of a string array from which a string is extracted using subscripts
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subscript
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A numeric expression used to select an element of an array
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beginning position
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A numeric expression specifying the position of the first character in a substring (see substring)
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ending position
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A numeric expression specifying the position of the last character in a substring (see substring)
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substring length
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A numeric expression specifying the maximum number of characters to be included in a substring (see substring)
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string function keyword
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A keyword that invokes a machine-resident function which returns a string value. String function keywords always end with a dollar sign ($).
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string function name
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The name of a user-defined function that returns a string value
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parameter
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A numeric expression, string expression, or I/O path that is passed to a function
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