feat: Soluciona o exercício 09 - Most repeated char

09-mostRepeatedChar/index.js

@@ -1,4 +1,19 @@
 export function mostUsedChar(text) {
     // implementar logica aqui
-    return ""
+    let freqCounter = {}
+    let lcText = text.toLowerCase()
+
+    for (let char of lcText) {
+        freqCounter[char] = freqCounter[char] + 1 || 1;
+    }
+
+    let maxCount = 0;
+    let mostUsedChar = null;
+    for(let key in freqCounter) {
+        if(freqCounter[key] > maxCount) {
+            maxCount = freqCounter[key]
+            mostUsedChar = key
+        }
+    }
+    return mostUsedChar
 }