Objective-C Basics, One of the Challange Task

Hi, Megha. First off I will encourage you to make use of the Get Help and Help buttons from within the section you are currently having questions about. This will add a link to the current course and section you are working in which provides more context for people that want to answer your questions. Also, always post any code you have already written so we can see where exactly you are in solving the challenge yourself.

You stated that you were having an interpretration issue. So, I'm gonna assume you already understand some basics already. However, I'm still going to walk through each step to make sure it's clear what the challenge is asking. Now, moving on to your question. Assuming you are at this challenge, and at task 2, let's say you've done this much

int mathTotal;
bool isComplete;

You're first objective now is to create a for loop that begins with a value of 5 and ends with a value of 25. Here's a for loop's structure

for (/* Instantiate local variables*/ ; /* Condition to keep looping. */ ; /* End of loop expressions */) {
    // Do something.
}

Now let's implement what the challenge is asking of the for loop

// Create a for loop that will begin with a value of 5 and end with a value of 25.
for (int i = 5; i <= 25; i++) {
    // Do something.
}

You can see that we've created a local variable i that is assigned the initial value of 5. We then added a condition to keep looping while i is less than or equal to 25. Lastly we added an expression to increment the value of i after each iteration.

The challenge now asks "In each iteration, add the incrementing value to mathTotal". To do this, we will add a line of code within the loop body

for (int i = 5; i <= 25; i++) {
    // In each iteration, add the incrementing value to mathTotal
    mathTotal += i;
}

Lastly, it asks for you to set isComplete to true when your for loop has finished running. So, let's do that and add everything else from above together to see what the final product should be

int mathTotal;
bool isComplete;

for (int i = 5; i <= 25; i++) {
    mathTotal += i;
}
isComplete = true;

Hope this helped you out!