NSNumber integerValue example objc

You can extract the integer value from a NSNumber object by calling NSNumber:integerValue method. NSNumber is an general container object for any number(integer, float, double...). Note that NSNumber:integerValue method returns an integer value that is not an object but a native type value. NSInteger is just another name for 'int' type. [NSNumber:integerValue example]

Example>

#import <Foundation/Foundation.h>

int main(int argc, char *argv[])

{

NSAutoreleasePool *pool = [NSAutoreleasePool new];

NSNumber *objNum;

NSInteger n;

// create a NSNumber object with int value 100.

// it returns an autoreleased object. 

//

objNum = [NSNumber numberWithInt:100];

// Get the integer value from NSNumber.

//


n = [objNum integerValue];

NSLog(@"n:%i",n);


objNum = nil;

 


// allocate a number with Double value. not an autoreleased object.

//


objNum = [[NSNumber alloc]initWithDouble:0.7];

NSLog(@"number:%f", [objNum doubleValue]);

[objNum release];

[pool drain];

return 0; 

}