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DELAY Statement

Summary

Pauses the program for a certain number of seconds.

Syntax

DELAY numeric expression

Remarks and Examples

The DELAY statement causes the program to pause for the number of seconds specified.

10 PRINT "Please wait for ten seconds."
20 DELAY 10
30 PRINT "OK, I'm back."

A fractional number of seconds is permitted: DELAY 0.5 will wait for half of one second. The smallest possible delay is one millisecond, i.e. one thousandth of a second (DELAY 0.001). DELAY statements with values less than 0.001 will not explicitly pause for any length of time (although the execution of the statement will consume some amount of time).

A program that is "stuck" on a lengthy delay can be interrupted using the Run | Break menu option.

An old-fashioned way to cause delays in a BASIC program is to use a FOR-NEXT loop with no statements between the FOR and NEXT statements, like this:

10 FOR X = 1 TO 50000 : NEXT X

That has the disadvantage that the exact length of the delay is unpredictable. The delay would be shorter on faster computers, because a faster computer can count through the iterations faster. Using the DELAY statement ensures that the delay is the same, regardless of what speed of computer ReadyBASIC is running on.




Copyright 2006-2008, Kevin Matz, All Rights Reserved.