Complete to-pounds interpret exercise with step breakdown

Author: salahalsabhi

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

@@ -23,5 +23,39 @@ console.log(`£${pounds}.${pence}`);
 // You need to do a step-by-step breakdown of each line in this program
 // Try and describe the purpose / rationale behind each step
 
-// To begin, we can start with
-// 1. const penceString = "399p": initialises a string variable with the value "399p"
+//Answer:
+
+// 1. const penceString = "399p"
+//    Initialises a string variable with the value "399p"
+//    (price written in pence, with a trailing "p").
+
+// 2. penceString.substring(0, penceString.length - 1)
+//    Removes the final character "p".
+//    For "399p" this becomes "399".
+//    Stored in penceStringWithoutTrailingP.
+
+// 3. penceStringWithoutTrailingP.padStart(3, "0")
+//    Ensures the string is at least 3 characters long by padding
+//    with "0" on the left if needed.
+//    "399" stays "399".
+//    Example: "5" would become "005", "42" would become "042".
+//    This makes it easier to always treat the last 2 digits as pence.
+
+// 4. paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2)
+//    Takes everything except the last 2 characters → the pounds part.
+//    For "399" this is "3".
+
+// 5. paddedPenceNumberString.substring(paddedPenceNumberString.length - 2)
+//    Takes only the last 2 characters → the pence part.
+//    For "399" this is "99".
+
+// 6. .padEnd(2, "0") on the pence part
+//    Ensures pence is always 2 digits (adds "0" on the right if needed).
+//    "99" stays "99".
+//    Example: if pence were "5", it would become "50" with padEnd —
+//    (note: for money, padStart is usually more common for the numeric part;
+//    here the code uses padEnd as written).
+
+// 7. console.log(`£${pounds}.${pence}`)
+//    Prints the final price in pounds format.
+//    For this input: £3.99