add to lower case question

Author: rishabh1403

701-800/709-to-lower-case.js

@@ -0,0 +1,22 @@
+
+const isUpperCase = char => {
+  let ascii = char.charCodeAt(0);
+
+  if (ascii >= 65 && ascii <= 90) {
+    return true;
+  }
+
+  return false
+}
+
+const toLower = char => {
+  let ascii = char.charCodeAt(0);
+
+  ascii = String.fromCharCode(ascii + 32);
+
+  return ascii
+}
+
+var toLowerCase = function (str) {
+  return str.split("").map(s => isUpperCase(s) ? toLower(s) : s).join("");
+};