Loops - Exercises - ForceWise - Salesforce Study Lessons, Practice Exams and more

Question 1 of 16

1. Question

Jack is writing a Salesforce Apex program to log the message “Welcome to Apex!” exactly 5 times using a do-while loop. He’s set up a variable timesShown for counting.

Fill in the blanks to complete the loop:

String message = “Welcome to Apex!”;
Integer timesShown = 1;

do {
System.debug( );
;
} while ( <= 5);

Question 2 of 16

2. Question

While learning about loops in Salesforce Apex, Jenny wants to create a loop that logs the message “Apex is fun!” five times. She has initialized a variable named loopCounter.

Fill in the blanks to help Jenny complete her loop:

String message = “Apex is fun!”;
Integer loopCounter = 1;

do {
System.debug( );
;
} while ( <= 5);

Question 3 of 16

3. Question

To understand the mechanics of do-while loops, a developer wants to print all numbers between 1 and 5 inclusive. They’ve initialized a num variable for this purpose.

Complete the loop to achieve this:

Integer num = 1;

do {
System.debug( );
;
} while ( <= 5);

Question 4 of 16

4. Question

A Salesforce developer needs to display the phrase “Learning Apex!” exactly 4 times. They have initialized a variable iterations to 1.

Complete the do-while loop to achieve this:

String phrase = “Learning Apex!”;
Integer iterations = 1;

do {
System.debug( );
;
} while (iterations 4);

Question 5 of 16

5. Question

Jake is aiming to practice Salesforce Apex by printing the phrase “Apex Rocks!” exactly three times using a while loop. He’s already set up a counter called iterations.

Complete the loop for him:

String phrase = “Apex Rocks!”;
Integer iterations = 1;

while ( <= 3) {
System.debug( );
;
}

Question 6 of 16

6. Question

Maria wants to log all even numbers between 2 and 8 inclusive using a while loop in her Salesforce Apex program. She initializes the variable evenNum.

Help her fill in the blanks to achieve this:

Integer evenNum = 2;

while ( <= 8) {
System.debug( );
2;
}

Question 7 of 16

7. Question

Tom is practicing Salesforce Apex and aims to print the message “Learning Apex!” four times using a while loop. He’s set a counter variable named repeats.

Fill in the blanks to help him:

String text = “Learning Apex!”;
Integer repeats = 1;

while ( < 5) {
System.debug( );
++;
}

Question 8 of 16

8. Question

Lisa is working on a Salesforce Apex program and wishes to log all odd numbers from 1 to 7 using a while loop. She starts by initializing the variable oddNum.

Complete the loop to achieve this:

Integer oddNum = 1;

while ( <= 7) {
System.debug( );
+= 2;
}

Question 9 of 16

9. Question

Daniel wishes to log the numbers 5 through 15 in his Salesforce Apex program using a traditional for loop.

Can you assist him by completing the blanks in his loop?

for (Integer n = , m = 0; n <= ; ++) { System.debug(n); }

Question 10 of 16

10. Question

Alex is trying to create a Salesforce Apex program that logs every third number starting from 3 and ending at 12 using a traditional for loop. He has begun the loop structure but needs help with the conditions.

Complete the blanks for him:

for (Integer k = , x = 0; k <= ; k+= ) {
System.debug(k);
}

Question 11 of 16

11. Question

Sophia is developing a Salesforce Apex program to calculate the total of the first 5 even numbers. She has initialized a sum variable to 0 and wishes to iterate through these numbers using a traditional for loop.

Assist her by filling in the blanks:

Integer sum = 0;
for (Integer i = , j = 0; i <= ; i+= ) {
sum += i;
}
System.debug(sum);

Question 12 of 16

12. Question

Ella is trying to write a program in Salesforce Apex to sum up the first five positive numbers using a traditional for loop. She has a variable sum to keep track of the total and wants to use a loop control variable numCount.

Complete the blanks to help her:

Integer sum = 0;
for (Integer numCount = 1, dummyVar = 0; <= 5; ) {
sum += ;
}
System.debug(sum);

Question 13 of 16

13. Question

Jane is working on a Salesforce project where she is provided with a list of product prices. She needs to iterate over each price and log the value for further review. Given the following list:

List<Decimal> productPrices = new List<Decimal>{19.99, 29.99, 49.99, 99.99};

Fill in the blanks to correctly iterate over the list and debug each product price:

for ( price : ) {
System.debug( );
}

Question 14 of 16

14. Question

You are provided with a set of product IDs that need to be checked for processing. Given the set:

Set<Integer> productIds = new Set<Integer>{101, 102, 103, 104};

Complete the following to loop through each product ID and log its value:

for ( id : ) {
System.debug( );
}

Question 15 of 16

15. Question

You are given a list of Account Names and are tasked with iterating over each of them to log their value.

Here’s the list:

List<String> accountNames = new List<String>{‘Acme Corp’, ‘Global Tech’, ‘Innovate Solutions’, ‘Tech Titans’};

Fill in the blanks to correctly iterate over the list and debug each Account Name:

for ( account : ) {
System.debug( );
}

Question 16 of 16

16. Question

Lily is organizing a lucky draw event and has a set of unique ticket numbers. She wants to validate each ticket number by printing it.

Fill in the blanks to achieve this:

Set ticketNumbers = new Set{1023, 1054, 1078};
for ( ticket : ) {
System.debug(ticket);
}

Loops – Exercises

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