Pos Parameter: Difference between revisions

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===Use with READ===
===Use with READ===
In [[Read file]] statements, the optional "POS=num-expr" clause is used only with external files opened for RELATIVE processing; its purpose is to position to a specified byte before reading. After the numeric expression (usually a simple numeric variable or constant) is evaluated and rounded to an integer, the system reads a complete record beginning at the specified byte number. If "POS = num-expr" is not specified, the system sequentially reads the next complete record after the last byte read.
In [[Read file]] and [[Restore File]] statements, the optional "POS=num-expr" clause is used only with external files opened for RELATIVE processing; its purpose is to position to a specified byte before reading. After the numeric expression (usually a simple numeric variable or constant) is evaluated and rounded to an integer, the system reads a complete record beginning at the specified byte number. If "POS = num-expr" is not specified, the system sequentially reads the next complete record after the last byte read.


===Use with FORM===
===Use with FORM===

Revision as of 19:42, 6 August 2013

Use with READ

In Read file and Restore File statements, the optional "POS=num-expr" clause is used only with external files opened for RELATIVE processing; its purpose is to position to a specified byte before reading. After the numeric expression (usually a simple numeric variable or constant) is evaluated and rounded to an integer, the system reads a complete record beginning at the specified byte number. If "POS = num-expr" is not specified, the system sequentially reads the next complete record after the last byte read.

Use with FORM

In FORM statements, the POS parameter refers to a position on the screen by column. POS is followed by a space and then any integer or numeric variable. The following example will print the name "Camilla" starting at column 60:

00100 Print using nameform: "Camilla"
00110 nameform: form pos 60, c 15

POS is also used while printing to a printer or window.