listing out the logic of each step

Author: TzeMingHo

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

@@ -25,3 +25,27 @@ 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): 
+//    2.1 removes the trailing 'p' from the string by taking a substring from index 0 to the second last character
+//    2.2 penceStringWithoutTrailingP now = "399"
+
+// 3. const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0"):
+//    3.1 ensures the string has at least 3 characters by adding zeros to the start if necessary
+//    3.2 However, since "399" already has 3 characters, it remains unchanged
+//    3.3 paddedPenceNumberString now = "399"
+
+// 4. const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2):
+//    4.1 taking the first characters of the string up to the last two characters
+//    4.2 since "399" has only 3 characters, this only takes the first character
+//    4.3 pounds now = "3"
+
+// 5. const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0"):
+//    5.1 takes the last two characters of the string to represent the pence
+//    5.2 since "399" has only 3 characters, this takes the last two characters "99"
+//    5.3 padEnd(2, "0") ensures that if there were less than 2 characters, it would add a "0" to the end
+//    5.4 pence now = "99"
+
+// 6. console.log(`£${pounds}.${pence}`):
+//    6.1 constructs a formatted string representing the price in pounds and pence
+//    6.2 prints "£3.99" to the console