Docs / String

IndexOf()

IndexOf is an AMPscript function in the string category. 1-based; returns 0 when not found; case-insensitive.

Syntax

IndexOf(str, search)

Example

%%=IndexOf("ampscript", "script")=%%
Rendered output
4

Output produced by AmpSend's AMPscript engine (validated against Salesforce's own test corpus) - not a hand-written result.

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Official Salesforce documentation

IndexOf in the official AMPscript reference - or browse the official index of AMPscript functions for platform behavior and edge cases.

Related string functions

ConcatLengthLowercaseUppercaseProperCaseTrimReplaceReplaceListCharSubstringRegExMatchBuildRowsetFromStringBuildRowsetFromJsonStringToDateStringToHex