Explain step-by-step conversion from pence to pounds

Author: lauracs24

Sprint-1/3-mandatory-interpret/3-to-pounds.js

@@ -25,3 +25,56 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+
+// creates a string that represents a price in pence, including the letter "p"
+//
+// Example: "399p"
+//
+// This is the original input value we want to convert into pounds.
+
+
+// 2. const penceStringWithoutTrailingP = ...
+// Uses substring to remove the last character ("p") from the string
+//
+// We take the string from index 0 up to (but not including) the last character
+//
+// Result: "399"
+//
+// This leaves us with only the numeric part of the price as a string.
+
+
+// 3. const paddedPenceNumberString = ...
+// padStart ensures the string is at least 3 characters long
+//
+// This is important for small values like "5p":
+// "5" becomes "005"
+//
+// Result for "399": "399"
+// Result for "5p": "005"
+
+
+// 4. const pounds = ...
+// Extracts all characters except the last two
+//
+// The last two characters represent pence,
+// everything before that represents pounds
+//
+// For "399":
+// pounds = "3"
+
+
+// 5. const pence = ...
+// Takes the last two characters of the string
+//
+// padEnd ensures the pence value is always two digits
+//
+// For "399":
+// pence = "99"
+
+
+// 6. console.log(`£${pounds}.${pence}`)
+// Combines pounds and pence into a formatted price string
+//
+// Final output:
+// £3.99
+