Resolved Issue [Program]: Write a F# program to convert string to vow…

…elcase #3593 (#4803)

Co-authored-by: Anandha Krishnan S <anandajith@gmail.com>
Co-authored-by: Baliram Singh <heyome9a@gmail.com>

program/program/convert-string-to-vowelcase/ConvertStringToVowelcase.fs

@@ -0,0 +1,16 @@
+let convertToVowelCase (inputString: string) =
+    let vowels = "aeiouAEIOU"
+
+    let isVowel (c: char) = vowels.Contains(c)
+
+    let applyVowelCase (c: char) =
+        if isVowel c then System.Char.ToUpper(c) else System.Char.ToLower(c)
+
+    let result = inputString.ToCharArray() |> Array.map applyVowelCase |> System.String
+
+    result
+
+// Example usage:
+let input = "hello world"
+let output = convertToVowelCase input
+printfn "Input: %s\nOutput: %s" input output