I Added working countChar function

Author: khalidbih

Sprint-3/2-practice-tdd/count.js

@@ -1,5 +1,12 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let count = 0;
+
+  for (let i = 0; i < stringOfCharacters.length; i++) {
+    if (stringOfCharacters[i] ===findCharacter) {
+      count++;
+    }
+  }
+  return count;
 }
 
 module.exports = countChar;