strlen()

Switch services using the Version drop-down list. Learn more about navigation.
Applies to: ✅ Microsoft Fabric ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel

Returns the length, in characters, of the input string.

Note

This function counts Unicode code points.

Syntax

strlen(source)

Learn more about syntax conventions.

Parameters

Name	Type	Required	Description
source	string	✔️	The string for which to return the length.

Returns

Returns the length, in characters, of the input string.

Examples

String of letters

Run the query

print length = strlen("hello")

Output

length
5

String of letters and symbols

Run the query

print length = strlen("⒦⒰⒮⒯⒪")

Output

length
5

String with grapheme

Run the query

print strlen('Çedilla') // the first character is a grapheme cluster
                        // that requires 2 code points to represent

Output

length
8