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iosobjective-carc4random

How to generate random 6 digits number by a button?


I tried random generate number from 1 to 100.How to change random 6 digits ?

Note :Numbers can not start with 0(zero)

Random from 1 to 100 codes

 #import <UIKit/UIKit.h>

 @interface RandomNumberGenViewController : UIViewController {

 int number;
 IBOutlet UILabel *label;

 }

 -(IBAction)generateNumber:(id)sender;

 @end



 @implementation RandomNumberGenViewController

 -(IBAction)generateNumber:(id)sender {

 number = (arc4random()%100)+1; //Generates Number from 1 to 100.
 NSString *string = [NSString stringWithFormat:@"%i", number];
 label.text = string

 }

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Solution

  • A random number with 6 digits would be:

    int number = arc4random_uniform(1000000);
    

    But that gives a number from 0 to 999,999. It sounds like you want a random number from 100,000 to 999,999. So do this:

    int number = arc4random_uniform(900000) + 100000;