layout	page_title	sidebar_current	description
functions	substr function	docs-funcs-string-substr	The substr function extracts a substring from a given string by offset and length.

`substr` Function

substr extracts a substring from a given string by offset and length.

substr(string, offset, length)

Examples

> substr("hello world", 1, 4)
ello

The offset and length are both counted in unicode characters rather than bytes:

> substr("🤔🤷", 0, 1)
🤔