Understanding InStr Function
The InStr function returns a numeric value indicating the position where a substring first appears within a text string. If no match is found, it returns 0.
[Insert YouTube Video: "Excel VBA (Macro) Instr Function" by Chris Terrell - https://www.youtube.com/watch?v=zmE8b04T1jQ] This video provides a comprehensive overview of the InStr function basics
Basic Syntax
InStr([start], string1, string2, [compare])
| Parameter | Description |
|---|---|
| start | Optional. Starting position for search (default: 1) |
| string1 | Required. The main string to search within |
| string2 | Required. The substring to search for |
| compare | Optional. Comparison type (0=Binary, 1=Text) |
Common Use Cases
Text Position Finding
Sub FindTextPosition()
Dim website As String
website = "www.excel-pratique.com"
MsgBox InStr(1, website, "excel") 'Returns: 5
End Sub
Return Values
| Input Condition | Return Value |
|---|---|
| String1 is empty | 0 |
| String2 not found | 0 |
| String2 is found | Position number |
| Start > String2 | 0 |
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