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iOS Objective-C Basics More Operators! Logical Operators

Stefan Mach
Stefan Mach
3,691 Points
Posted by Stefan Mach
Stefan Mach
3,691 Points

What is wrong with this code?

This says there are compiler errors but I do not see any and the preview is no help at all. What am I missing?

variable_assignment.mm 
bool isMediumSize;

int inchesTall = 45;

int inchesTall = 64;

if (inchesTall >48 && <68)
{
isMediumSize = TRUE;
}

3 Answers

Steve Hunter
Steve Hunter
57,712 Points

Hi Stefan,

The first part of this challenge asks for a bool and an int variable to be created, with the int being assigned a value of 45. That looks like:

bool isMediumSize;
int inchesTall = 45;

You've done that! Good work.

Next, you change the value assigned to inchesTall. To do that, you don't need the int keyword again as the app nows that inchesTall is an int.

Then you need an if conditional. You've identified that correctly and have mainly done the test correctly. You need to check each condition against inchesTall; you can't do both tests with one mention of inchesTall, you need to make both tests expressly.

Like this:

bool isMediumSize;
int inchesTall = 45;
inchesTall = 64; 
if(inchesTall > 48 && inchesTall < 68){
  isMediumSize = TRUE;
}

You had that done!

Steve.

Steve Hunter
Steve Hunter
57,712 Points

:+1:

andren
andren
28,558 Points
andren
andren
28,558 Points

When you specify multiple conditions using && you can't just provide a list of conditions based on the fist one, each of the conditions has to be an independent condition that make sense on it's own. Meaning that you have to compare to the inchesTall variable in both conditions.

The second issue is that you declare the inchesTall variable twice, which is invalid. When you are changing the value of a variable you should not include the type of the variable, that is only done when you want to create a new variable.

If you fix those issues like this:

bool isMediumSize;

int inchesTall = 45;

inchesTall = 64;

if (inchesTall >48 && inchesTall <68)
{
isMediumSize = TRUE;
}

Then the code will pass.