How to compare two NSInteger?

Question

How do we compare two NSInteger numbers ? I have two NSIntegers and comparing them the regular way wasnt working.

if (NSIntegerNumber1 >= NSIntegerNumber2) {
    //do something
}

Eventhough, the first value was 13 and the second value was 17, the if loop is executing

Any idea ?

That's how you do it. Double-check their values: set a breakpoint right before the `if` and make sure they're what you expect. — jscs, Feb 28 '12 at 05:15
NSInteger is alis for int. so it should work. Other wise specify the type of NSIntegerNumber1 variable.. — Inder Kumar Rathore, Feb 28 '12 at 06:01
Are you sure these are NSInteger numbers? My guess is these are NSNumbers and you are trying to compare the pointers. — SVGreg, Feb 28 '12 at 12:24
Make sure when you debug you are using p instead of po, thats what fixed my issue — yoshyosh, Aug 14 '14 at 18:18
Why would p understand types when po does not? If po does not know the type why does it print a seemingly valid value? Whatever the reasons, this helped me find my underlying issue. — owenfi, Apr 21 '15 at 11:57

justin · Answer 1 · 2015-12-02T17:52:49.117

13

NSInteger is just a typedef for a builtin integral type (e.g. int or long).

It is safe to compare using a == b.

Other common operators behave predictably: !=, <=, <, >= et al.

Finally, NSInteger's underlying type varies by platform/architecture. It is not safe to assume it will always be 32 or 64 bit.

edited Dec 02 '15 at 17:52

answered Feb 28 '12 at 05:21

justin

104,054
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This should be voted up, as it explains the reasoning – Ali Saeed Nov 27 '15 at 21:47

score 12 · Answer 2 · answered Feb 28 '12 at 05:19

Well, since you have Integer and Number in the name, you might have declared the two values as NSNumber instead of NSInteger. If so, then you need to do the following:

 if ([NSIntegerNumber1 intValue] >= [NSIntegerNumber2 intValue]) {
      // do something
 }

Otherwise it should work as is!

score 9 · Accepted Answer · edited May 25 '16 at 22:56

9

NSInteger int1;
NSInteger int2;

int1 = 13;
int2 = 17;

if (int1 > int2)
{
    NSLog(@"works");
}

edited May 25 '16 at 22:56

Colin Basnett

4,052
2
30
49

answered Feb 28 '12 at 05:25

Rama Rao

1,043
5
22

score 2 · Answer 4 · answered Feb 28 '12 at 11:17

2

When comparing integers, using this, would work just fine:

int a = 5;
int b = 7;

if (a < b) {

NSLog(@"%d is smaller than %d" a, b);   

}

answered Feb 28 '12 at 11:17

wizH

488
2
10

How to compare two NSInteger?

4 Answers4