Refactor code into reusable function

Author: russom

Sprint-3/3-mandatory-implement/3-to-pounds.js

@@ -4,3 +4,16 @@
 // You will need to declare a function called toPounds with an appropriately named parameter.
 
 // You should call this function a number of times to check it works for different inputs
+
+function toPound(priceInPence) {
+  const penceDigits = priceInPence
+    .substring(0, priceInPence.length - 1)
+    .padStart(3, "0");
+
+  const poundsPart = penceDigits.substring(0, penceDigits.length - 2);
+
+  const pencePart = penceDigits.substring(penceDigits.length - 2);
+
+  return `£${poundsPart}.${pencePart}`;
+}
+console.log(toPound("399p"));