Initializing help system before first use

copytext

Purpose
Copy a part of a text or string.
Synopsis
function copytext(t:text|string, i1:integer, i2:integer):text
function copytext(t:text|string, ta:textarea):text
Arguments
t 
A string or text object
i1 
Starting position of the region to copy
i2 
End position of the region to copy
ta 
A text area object
Return value
A copy of the region.
Example
The following: 
writeln(copytext("abcdefgh",3,7))
writeln(copytext("abcdefgh",7,10))
produces this output: 
cdefg
gh
Further information
This function returns an empty text if the bounds are not compatible with the string ( e.g. starting position larger than the length of the string) or inconsistent ( e.g. starting position after end position).
Related topics
deltext, inserttext, pastetext, cuttext
Module
mmsystem

Parent Topic Procedures and functions

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