Basic Characteristics RAPID

Expressions Basic Characteristics RAPID
Table 4 shows the one operation possible.
.
7.4 Using data in expressions
An entire variable, persistent or constant can be a part of an expression.
Example: 2*pi*radius
Arrays
A variable, persistent or constant declared as an array can be referenced to the whole
array or a single element.
An array element is referenced using the index number of the element. The index is an
integer value greater than 0 and may not violate the declared dimension. Index value 1
selects the first element. The number of elements in the index list must fit the declared
degree (1, 2 or 3) of the array.
Example: VAR num row{3};
VAR num column{3};
VAR num value;
.
value := column{3}; only one element in the array
row := column; all elements in the array
Records
Table 4
Operator Operation Operand types Result type
+ string concatenation string + string string
A variable, persistent or constant declared as a record can be referenced to the whole
record or a single component.
A record component is referenced using the component name.
Example: VAR pos home;
VAR pos pos1;
VAR num yvalue;
..
yvalue := home.y; the Y component only
pos1 := home; the whole position
5-28 RAPID Reference Manual