LookUp
Syntax
Assignment Variable = LookUp Index, [ Constant {, Constant…etc } ]
Overview
Look up the value specified by the index and store it in variable. If the index exceeds the highest index value of the items in the list, then variable remains unchanged.
Parameters
Index may be a constant of variable. This is the item number of the value to be retrieved from the list. Constant(s) may be any 8-bit value (0-255). A maximum of 65536 values may be placed between the square brackets. Assignment Variable is a user define variable that holds the result of the search.
Example
' Create an animation of a spinning line on an LCD.
Device = 24HJ128GP502 ' Select the device to compile for
Declare Xtal = 16
Dim Index as Byte
Dim Frame as Byte
Cls ' Clear the LCD
Do
For Index = 0 to 3 ' Create a loop of 4
Frame = LookUp Index, [ "|\-/" ] ' Table of animation characters
Print At 1, 1, Frame ' Display the character
DelayMs 200 ' So we can see the animation
Next ' Close the loop
Loop ' Repeat foreverNotes.
Index starts at value 0. For example, in the LookUp command below. If the first value (10) is required, then index will be loaded with 0, and 1 for the second value (20) etc.
Var1 = LookUp Index, [10, 20, 30]See also : Dim, cPtr8, cPtr16, cPtr24, cPtr32, Cread8, Cread16, Cread24, Cread32, Edata, Eread, LookDown, LookDownL, LookUpL.
