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Objective C - Array With Numbers
NSArray *myArray = [NSArray arrayWithObjects:
                    [NSNumber numberWithInt:1000],[NSNumber numberWithInt:237], [NSNumber numberWithInt:2673], nil];

int total = 0;
for(int i = 0; i < [myArray count]; i += 1 ){
    total += [[myArray objectAtIndex: i]intValue];
    NSLog(@"%i", total);
}

NSInteger myArray[20];

for (int i=0;i<20;i++) {
  int num=myArray[i];

  //do something
 }

for (NSNumber *n in myArray) {
 int num = [n intValue];

 //do something....

}

NSNumber *n = @100;

NSArray *array = @[@100,@50,@10];

NSArray *numbers = [@"1000,237,2673" componentsSeparatedByString:@","];
for (NSString *i in numbers) {
    [i intValue]; // Do something.
}

NSInteger myCArray = { 1000, 237, 2673 };
// calculate number of elements
NSUInteger myCArrayLength = sizeof(myCArray) / sizeof(NSInteger;

NSMutableArray *myNSArray = [NSMutableArray arrayWithCapacity:myCArrayLength];
for(NSUInteger ix = 0; ix < myCArrayLength; ix++)
   [myNSArray addObject:[NSNumber numberWithInteger:myCArray[ix]];