add to pounds

Author: mandipsanger

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

@@ -17,11 +17,17 @@ const pence = paddedPenceNumberString
 
 console.log(`£${pounds}.${pence}`);
 
-// This program takes a string representing a price in pence
+// This program takes a string representindng a price in pence
 // The program then builds up a string representing the price in pounds
 
 // 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"
+// const penceString = "399p": initialises a string variable with the value "399p"
+// 1. const penceStringWithoutTrailingP = penceString.substring(0, penceString.length - 1): creates a new string variable that removes the last character "p" from the original string
+// 2. const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0"): creates a new string variable that pads the original string with leading zeros to make it 3 characters long
+// 3. const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2): extracts the pounds portion of the string by taking all characters except the last two
+// 4. const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0"): extracts the pence portion of the string by taking the last two characters and pads it with trailing zeros to make it 2 characters long
+// 5. console.log(`£${pounds}.${pence}`): outputs the final formatted price in pounds and pence to the console