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String substitution using placeholders

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I've just started to use AutoIT after spending time learning Python & Powershell.

I'm hoping there is a method for variable substitution in strings, without constant concatenation.

For example:

first = "a"

second = "hope"

third = "bar"

foo = "This is %1 test, I %2 it will produce %3" "a", "hope", "bar"


foo = "This is %1 test, I %2 it will produce %3" first, second, thrid

would produce:

print foo

This is a test, I hope it will produce bar

or in Python if you prefer:

foo = "This is {0} test, I {1} it will produce {2}".Format("a", "hope", "bar")


foo = "This is {0} test, I {1} it will produce {3}".Format(first, second, third)

Currently I'm resorting to concatenation which is much more prone to typos, and tedious to write.

e.g. (using AutoIt syntax)

$foo = "This is " & $first & " test, I " & $second & " it will produce " & $third

is this hope in vain, I've search the internet in general and these forums for:


Variable substitution

String substitution

and get roughly the same 26 results for each, none of which are doing what I'm trying (most are regex), whereas searching for 'placehold' gets me 7 results about CD-ROM drives...

Thank you for your assistance.

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Soemthing like this perhaps? :huh:

#include <MsgBoxConstants.au3>

Local $aA[3] =["a", "hope", "bar"]

MsgBox($MB_SYSTEMMODAL, "Concatenation", "This is " & $aA[0] & " test, I " & $aA[1] & " it will produce " & $aA[2])

Public_Domain.png.2d871819fcb9957cf44f4514551a2935.png Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind

Open spoiler to see my UDFs:


ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area


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Thanks for the suggestion Melba23, but aside from creating an array of the strings, instead of single variable names it doesn't actually change anything.

As you probably noticed the Python line has only 1 pair of " for the entire string, whereas AutoIt has 3 pairs of ". I'm trying to replicate the single pair of " syntax.

Edited by Sensillium

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