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What is a Unique number? A Unique number is a positive integer (without leading zeros)with no duplicate digitis. For example: 7,135,214,5243 are all unique numbers  whereas 33,3121,200 are not. import java.util.*; class Unique { public static void main(String args[]) { Scanner  sc=new Scanner(System.in); System.out.println("Enter a number :"); int n= sc.nextInt(); String s=integer.toString(n); int l=s.length(); int flag=0,i,j; for(i=0;i<l-1;i++) { for(j=i+1;j<l;j++) { if(s.charAt(i)==s.charAt(j)) { flag=1; break; } }} if(flag==0) System.out.println("It is an UniqueNumber"); else System.out.println("It is not am UniqueNumber"); }} OUTPUT: Enter a number: 5673 It is an Unique number Enter a number : 5675 It is not a Unique number

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