NSString *string = @"5";
int value = [string intValue];
	
NSString *string = /* Assume this exists. */;
int value = [string intValue];
	
[@"7" intValue];
	
[NSNumberFormatter numberFromString:@"7"];
	
NSInteger stringToInt(NSString *string) {
    return [string integerValue];
}
	
NSString* intToString(NSInteger integer) {
    return [NSString stringWithFormat:@"%d", integer];
}