---
name: "string-ci=?"
module: "strings"
section: "Unicode & Encoding"
---
Case-insensitive string equality comparison. Compares two strings after applying case folding to both.
```sema
(string-ci=? "Hello" "hello") ; => #t
(string-ci=? "ABC" "abc") ; => #t
(string-ci=? "CAFÉ" "café") ; => #t
(string-ci=? "hello" "world") ; => #f
```