explained the steps of the programs output

Author: chefmatthaus-hub

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

@@ -1,20 +1,27 @@
+//declaring a variable with the value of "399p"
 const penceString = "399p";
 
+//the .substring is removing the "p" from the value of penceString by taking the total length of the subString "4" - 1 = 3, by stripping the "p" leaving only 399
 const penceStringWithoutTrailingP = penceString.substring(
   0,
   penceString.length - 1
 );
 
+// padStart is creating a pad for the output by giving it an extra "0" if the value is less than £1
 const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+
+//The .substring is removing the "99" from the value of .penceStringWithoutTrailingP by taking the total length of the .penceStringWithoutTrailingP "3" - 2 = 1 by stripping the "99" leaving only the 3
 const pounds = paddedPenceNumberString.substring(
   0,
   paddedPenceNumberString.length - 2
 );
 
+// the .substring is doing the same as the "pound" variable declared in now line 14, by grabbing the last 2 characters "99" except it is ending the pad as safeguard to always ensure that two digits remain 
 const pence = paddedPenceNumberString
   .substring(paddedPenceNumberString.length - 2)
   .padEnd(2, "0");
 
+  // console.log is using template literals to combine the currency symbol, pound string decimal point and pence string. Giving us an output of £3.99
 console.log(`£${pounds}.${pence}`);
 
 // This program takes a string representing a price in pence