Question

Im making a simple NSArray, then getting a random Index from that array and storing it as an int, however im getting a warning saying it should be a long int, even though im only expecting it to return 0, 1 or 2. Not that its an issue, but i cant understand why.

NSArray *randomWordList = [NSArray arrayWithObjects:@"Hello", @"Test", @"Send", nil];  
int randomWordIndex = rand() % [randomWordList count];`

Answer 1

NSArray’s count method returns NSUInteger which is a unsigned long for 64-bit builds. The reason the compiler is warning you is because int holds a smaller range of numbers than long, so it is warning you of potential loss of data.

Just change int randomWordIndex to NSUInteger randomWordIndex.