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Feedback #1

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e3a3e79
Setting up GitHub Classroom Feedback
github-classroom[bot] Feb 5, 2026
d1f2b28
First 10 Question Solutions
mckayhowell Feb 6, 2026
0e59d86
All questions completed
mckayhowell Feb 6, 2026
fde80b0
Implemented Homework Feedback
mckayhowell Mar 2, 2026
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179 changes: 126 additions & 53 deletions force-app/main/default/classes/FlowControlLoopsCollections.cls
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@
* in flow control, loops, and collections. By mastering these concepts, developers will be able to write more
* efficient and effective code in their Salesforce projects.
*
* @author Your Name
* @author McKay Howell
*/

public with sharing class FlowControlLoopsCollections {
Expand All @@ -29,7 +29,10 @@
* @return "Hello World!" if x greater than y, otherwise return null.
*/
public static String helloWorld(Integer x, Integer y) {
return null; // Replace null with the variable you used to store the result
if (x == null || y == null || x <= y) {
return null;
}
return 'Hello World!'; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -42,7 +45,7 @@
* @return true if the person is eligible to vote, false otherwise.
*/
public static Boolean votingEligibility(Integer age) {
return null; // Replace null with the variable you used to store the result
return (age >= 18); // Replace null with the variable you used to store the result
}

/**
Expand All @@ -55,10 +58,11 @@
* @return The maximum of the two numbers, or null if either number is null.
*/
public static Integer findMax(Integer num1, Integer num2) {
// Initialize largestNum as null
Integer largestNum = null;

return null; // Replace null with the variable you used to store the result
if ( num1 == null || num2 == null) {
return null;
}
Integer largestNum = Math.max(num1, num2);
return largestNum; // Replace null with the variable you used to store the result
}


Expand All @@ -71,7 +75,15 @@
* @return A string indicating whether the number is "Positive", "Negative", or "Zero", or null if the number is null.
*/
public static String checkNumber(Integer a) {
return null; // Replace null with the variable you used to store the result
if (a == null) {
return null;
} else if (a > 0) {
return 'Positive';
} else if (a < 0) {
return 'Negative';
} else {
return 'Zero';
}
}

/**
Expand All @@ -83,7 +95,13 @@
* @return A string indicating whether the number is "Even" or "Odd", or null if the number is null.
*/
public static String checkEvenOdd(Integer a) {
return null; // Replace null with the variable you used to store the result
if(a == null) {
return null;
} else if (Math.mod(a, 2) == 0) {
return 'Even';
} else {
return 'Odd';
}
}

/**
Expand All @@ -94,7 +112,11 @@
* @return A string indicating whether the input is "Empty", "Null", or "Contains Text".
*/
public static String checkString(String a) {
return null; // Replace null with the variable you used to store the result
if (String.isBlank(a)) {
return a == null ? 'Null' : 'Empty';
} else {
return 'Contains Text';
}
}

/**
Expand All @@ -110,7 +132,17 @@
* @return The grade for the given score.
*/
public static String determineGrade(Integer score) {
return null; // Replace null with the variable you used to store the result
if (score >= 90) {
return 'A';
} else if (score >= 80) {
return 'B';
} else if (score >= 70) {
return 'C';
} else if (score >= 60) {
return 'D';
} else {
return 'F';
}
}


Expand All @@ -122,13 +154,11 @@
* @return The sum of all integers up to the limit.
*/
public static Integer sumUpToLimit(Integer intLimit) {
/*
for (){

}
*/

return null; // Replace null with the variable you used to store the result
Integer sum = 0;
for (Integer index = 1; index <= intLimit; index++){
sum += index;
}
return sum; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -139,15 +169,13 @@
*/
public static String returnHelloWorld() {
// Initialize the result String

String result = '';
// Use a for loop to append 'Hello World!;' to the result string three times
/*
for (){

}
*/
for (Integer index = 1; index <= 3; index++){
result += 'Hello World!; ';
}

return null; // Replace null with the variable you used to store the result
return result; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -162,17 +190,19 @@
*/
public static String repeatString(String inputString, Integer repeatCount) {
// Initialize the result String
String result = '';

// Use a for loop to append the inputString to the result string repeatCount times
/*
for () {

for (Integer index = 1; index <= repeatCount; index++) {
result += inputString;
// If it is not the last iteration, add a semicolon to separate the strings
if (index != repeatCount) {
result += '; ';
}
}
*/

// Return the final result string
return null; // Replace null with the variable you used to store the result
return result; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -183,14 +213,14 @@
*/
public static List<Integer> createAndPopulateList() {
// Create a new list of integers

List<Integer> intList = new List<Integer>{1, 2, 3};
// Add the integers 1, 2, and 3 to the list
// add 1
// add 2
// add 3

// Return the populated list
return null; // Replace null with the variable you used to store the result
return intList; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -203,10 +233,11 @@
// Create a new list of integers and add numbers 1 to 5
List<Integer> numberList = new List<Integer>{1, 2, 3, 4, 5}; //DO NOT CHANGE

// Remove the 3rd element (number 3) from the list
// Remove the 3rd element (number 3) from the list; index values start with 0, so the third element has index 2
numberList.remove(2);

// Return the updated list
return null; // Replace null with the variable you used to store the result
return numberList; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -218,14 +249,13 @@
*/
public static List<Integer> createIntegerList(Integer n) {
// Create a new list of integers

/*
for() {
//add integer to the list
List<Integer> intList = new List<Integer>();

for(Integer index = 1; index <= n; index++){
intList.add(index);
}
*/

return null; // Replace null with the variable you used to store the result
return intList; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -237,12 +267,9 @@
* @return A Set of unique strings.
*/
public static Set<String> createStringSet(List<String> inputList) {
// Create a new Set of strings
Set<String> stringSet = new Set<String>();

//add strings to the set

return null; // Replace null with the variable you used to store the result
// Create a new Set of strings with values initialized from the inputList (deduplicated)
Set<String> stringSet = new Set<String>(inputList);
return stringSet; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -254,11 +281,19 @@
public static Integer sumPositiveIntegers() {
List<Integer> numbers = new List<Integer>{-1, 2, -3, 4, -5, 6}; //DO NOT CHANGE

Integer sum = 0;
// Loop through the list of integers
for(Integer num : numbers){
// if the number is negative skip this iteration
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@walters954 walters954 Feb 9, 2026

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Great job using continue to skip negative numbers! This demonstrates you understand jump statements well.

I love that you're using a for-each loop here - it's cleaner and more readable than a traditional for loop when you don't need the index.

if(num < 0){
continue;
}
sum += num;
}



return null; // Replace null with the variable you used to store the result
return sum; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -271,11 +306,18 @@
*/
public static Integer findWordInList(String wordToFind, List<String> words) {
// The variable to store the index of the word
Integer index = -1;

// Loop through the list of words
for (String word : words){
// If the current word is the word to find, exit the loop
if(word.equals(wordToFind)){
index = words.indexOf(word);
break;
}
}

return null; // Replace null with the variable you used to store the result
return index; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -289,7 +331,15 @@
// The list of money in the wallet, represented in dollars and cents
List<Decimal> moneyInWallet = new List<Decimal>{0.50, 10, 3.84, 24.60, 9.08, 50, 4.90}; //DO NOT CHANGE

return null; // Replace null with the variable you used to store the result
final Decimal STOP_VALUE = 40.0;

Check warning

Code scanning / PMD

The final local variable name 'STOP_VALUE' doesn't match '[a-z][a-zA-Z0-9]*' Warning

The final local variable name 'STOP_VALUE' doesn't match '[a-z][a-zA-Z0-9]*'
Decimal total = 0.0;
for (Decimal money : moneyInWallet){
total += money;
if(total > STOP_VALUE){
break;
}
}
return total; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -300,15 +350,21 @@
*/
public static Map<String, Integer> addItemsToMap() {
// Initialize an empty Map
Map<String, Integer> fruits = new Map<String,Integer>();

// Add key-value pairs to the Map
// add Apples => 5
fruits.put('Apples', 5);
// add Oranges => 10
fruits.put('Oranges', 10);
// add Bananas => 15
fruits.put('Bananas', 15);
// add Pears => 20
fruits.put('Pears', 20);
// add Grapes => 25
fruits.put('Grapes', 25);

return null; // Replace null with the variable you used to store the result
return fruits; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -322,17 +378,23 @@
*/
public static Integer getSalary(String employeeName) {
// Initialize a Map
Map<String, Integer> employees = new Map<String, Integer>();

// Add key-value pairs to the Map
// add John Doe => 50000
employees.put('John Doe', 50000);
// add Jane Smith => 60000
employees.put('Jane Smith', 60000);
// add Sam Brown => 55000
employees.put('Sam Brown', 55000);
// add Alice Johnson => 65000
employees.put('Alice Johnson', 65000);

// Get the salary of the employee
Integer salary = employees.get(employeeName);

// Return the salary of the employee, or null if the employee is not found in the Map
return null; // Replace null with the variable you used to store the result
return salary; // Replace null with the variable you used to store the result
}

/**
Expand All @@ -349,20 +411,31 @@
// Initialize a Map
Map<String, Integer> employeeSalaries = new Map<String, Integer>();

// Add key-value pairs to the Map
// add John Doe => 50000
employeeSalaries.put('John Doe', 50000);
// add Jane Smith => 60000
employeeSalaries.put('Jane Smith', 60000);
// add Sam Brown => 55000
employeeSalaries.put('Sam Brown', 55000);
// add Alice Johnson => 65000
employeeSalaries.put('Alice Johnson', 65000);

// Initialize a list to store the names of high paid employees
List<String> highPaidEmployees = new List<String>();

final Integer HIGH_SALARY = 55000;

Check warning

Code scanning / PMD

The final local variable name 'HIGH_SALARY' doesn't match '[a-z][a-zA-Z0-9]*' Warning

The final local variable name 'HIGH_SALARY' doesn't match '[a-z][a-zA-Z0-9]*'
// Iterate over the Map using a for loop
for(String name : employeeSalaries.keySet()){
// Check if the salary of the employee is more than 55000
Integer salary = employeeSalaries.get(name);
if(salary > HIGH_SALARY){
// Add the employee to the list of high paid employees
highPaidEmployees.add(name);
}
}

// Return the list of high paid employees
return null; // Replace null with the variable you used to store the result
return highPaidEmployees; // Replace null with the variable you used to store the result
}

}
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