Answer questions in 3-to-pounds.js

Author: habohlin

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

@@ -6,6 +6,7 @@ const penceStringWithoutTrailingP = penceString.substring(
 );
 
 const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+
 const pounds = paddedPenceNumberString.substring(
   0,
   paddedPenceNumberString.length - 2
@@ -25,3 +26,47 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+
+
+// Answers
+
+
+// 2. const penceStringWithoutTrailingP = penceString.substring(
+  //    0,
+  //    penceString.length - 1
+//    );
+// This declares and initialises a new variable penceStringWithoutTrailingP that is a substring of
+// penceString, starting at position 0 and up to but not including the last position. So the new variable
+// gets the value "399", the p is left behind.
+
+
+// 3. const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+// We now want our value to be at least 3 digits long, but in case it is shorter, we want to fill up with zeros at
+// the start so it becomes 3 digits long. padStart does that, the 3 specifies minimum amount of digits and the "0"
+// specifies what to fill with. The result gets saved in new variable paddedPenceNumberString.
+
+
+// 4. const pounds = paddedPenceNumberString.substring(
+//      0,
+//      paddedPenceNumberString.length - 2
+//    );
+// Now we save the pounds amount into new variable pounds. We get the amount (which could be any amount of digits long)
+// by creating a substring from paddedPenceNumberString starting at position 0 and ending before the next to
+// last digit. The last two digits are the pence amount and they aren't included in pounds.
+
+
+// 5. const pence = paddedPenceNumberString
+//      .substring(paddedPenceNumberString.length - 2)
+//      .padEnd(2, "0");
+// Similarly to the previous operation, here we save the pence amount into new variable pence. We get it by
+// using substring on paddedPenceNumberString again, this time starting two digits from the end, saving the
+// final two digits into pence. Then, if the digits are fewer than 2, we chain a padEnd to add "0" until pence
+// is 2 digits long.
+// After trying different values, it seems like it is unnecessary to have the padEnd, since the pence will
+// always already be 2 digits long. Even if penceString started with just 1 digit, "0"s will have been padded
+// earlier at the beginning of the string, so pence can always be 2 digits and the padEnd will never take effect.
+
+
+// 6. console.log(`£${pounds}.${pence}`);
+// Using a template literal, here we log the £ sign followed by the the pounds amount, a period and the pence
+// amount, which is formatted to understand easier than the original penceString was.