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iOS Objective-C Basics Scope and Loops Review Scope and Loops

How do i set a value to true ,after a loop, in objective-c?

The exact request is, create a for loop that will begin with a value of 5 and end with a value of 25. In each iteration, add the incrementing value to mathTotal. When the loop is finished running, set 'isComplete' to true. I need help with the statement park of the for loop.

variable_assignment.mm
int mathTotal;
  bool isComplete;
for ( int i =5; i <=25; i ++){
isComplete = isComplete +i;
}

1 Answer

Jason Anders
MOD
Jason Anders
Treehouse Moderator 145,624 Points

Hey Alex,

There are a few issues going on with your code:

  • First, are some spacing issues inside of the for conditions. A couple are just for readability, but one is a syntax error. The one that will result in an error is the incrementer. There cannot be a space between the variable and the ++.

  • Next is the adding of the values of the incrementor. Right now you are trying to add it to the boolean variable isComplete. Also, with just a plus sign, you are performing a mathematical function instead of adding the new increment to the existing value. This needs a += But, the big thing is the values need to be added to the mathTotal.

  • Finally is changing the boolean to true. This has to be done outside of the loop after the loop has finished its iterations. This is simply done by assigning a value to the already declare variable.

Below is the corrected code for you to review. Have a look, and if it doesn't make sense, I suggeted you review the video before moving on, as these are fairly common and integral in Objective-C.

int mathTotal;
bool isComplete;

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

isComplete = true;

Keep Coding! :)

:dizzy: