Implement toPounds function to convert pence to pounds format

Author: Maryanne-K

Sprint-2/3-mandatory-implement/3-to-pounds.js

@@ -4,3 +4,11 @@
 // 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 toPounds(penceString) {
+    const penceStringWithoutTrailingP = penceString.substring (0, penceString.length -1);
+    const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+    const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2);
+    const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0");
+    return `£${pounds}.${pence}`;
+}
+console.log(toPounds("399p"));