Added pence-to-pounds solution with line by line breakdown and test cases

Author: Eugenie-A

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

@@ -25,3 +25,28 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+
+// 2. const penceStringWithoutTrailingP = penceString.substring(0, penceString.length - 1): 
+// Removes the final "p" character so only the numeric part of the price remains
+
+// 3. const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0"): 
+// Ensures the number is atleast 3 digits long by adding leading zeros when necessary, which helps with consistent formatting
+
+// 4. const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2): 
+// Extracts everything except the last two digits to form the pounds portion of the price
+
+// 5. const pence = paddedPenceNumberString .substring(paddedPenceNumberString.length - 2) .padEnd(2, "0"):
+// Takes the final two digits of the padded string to form the pence portion
+
+// 6. console.log(`£${pounds}.${pence}`):
+// Combines the pounds and pence into a standard currency format and prints it to the console, "£3.99"
+
+// Test cases to consider:
+// "5p" should output "£0.05"
+// "99p" shsould output "£0.99"
+// "399p" should output "£3.99"
+// "0p" should output "£0.00"
+// "1000p" should output "£10.00"
+
+// The program takes a string representing a price in pence (e.g., "399p")
+// and converts it to a string representing the price in pounds (e.g., "£3.99").