Brightsign BrightScript 3.0 Reference Manual Manual de usuario descargar pdf (Pagina 43)

POS(x)

This statement returns an integer that indicates the current cursor position from 0 to the maximum width of the window.

This statement requires a dummy argument in the form of any numeric expression.

Example:

print tab(40) pos(0) 'prints 40 at position 40

print "these" tab(pos(0)+5)"words" tab(pos(0)+5)"are";

print tab(pos(0)+5)"evenly" tab(pos(0)+5)"spaced"

FOR / END FOR

FOR counter_variable = initial_value TO final_value STEP increment / END FOR

The FOR statement creates an iterative loop that allows a sequence of program statements to be executed a specified

number of times.

The initial_value, final_value, and increment can be any expression. The first time the FOR statement is

executed, these three variables are evaluated and their values are saved; changing the variables during the loop will have

no affect on the operation of the loop. However, the counter_variable must not be changed, or the loop will not

operate normally. The first time the FOR statement is executed, the counter is set to both the value and type of the

initial_value.

At the beginning of each loop, the value of the counter_variable is compared with the final_value. If the value of

the counter_variable is greater than the final_value, the loop will complete and execution will continue with the

statement following the END FOR statement. If, on the other hand, the counter has not yet exceeded the final_value,

control passes to the first statement after the FOR statement. If increment is a negative number, the loop will complete

when the value of the counter_variable is less than the final_value.

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Brightsign BrightScript 3.0 Reference Manual Manual de usuario Pagina 43