Question

WAP to input a 4-digit number and check whether it is a unique number or not. A number is said to be unique if all its digits are different or none of its digits are repeated.​

Answer 1

Question:-

WAP to input a 4-digit number and check whether it is a unique number or not.

What is Unique Number?

• A number is said to be unique when all its digits are not same.
• Example:- 1234 is a unique number

Code Language:-

• Not mentioned.
• Since the code Language is not mentioned, it is done in QBASIC, JAVA and PYTHON

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Qbasic Code:-

CLS

PRINT "ENTER A NUMBER"

INPUT N

N1=N

N2=N

WHILE N<>0

D=N MOD 10

WHILE N1<>0

K=N1 MOD 10

IF D=K

C=1

N1=N1/10

WEND

N1=N2

N=N/10

WEND

IF C=1

PRINT "NUMBER IS NOT A UNIQUE NUMBER"

ELSE

PRINT "NUMBER IS A UNIQUE NUMBER"

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Java Code:-

package Coder;

import java.util.*;

public class Unique{

public static void main (String ar[]){

Scanner sc=new Scanner (System.in);

System.out.println("Enter a number");

int n=sc.nextInt();

int n1=n,n2=n; //Making copy of two numbers

int d=0,k=0,c=0; //'d' and 'k' are to extract the digits, 'c' is flag variable

while (n!=0){

d=n%10;

while(n1!=0){

k=n1%10;

if(d==k)

c++;

n1/=10;

}

n1=n2;n/=10;

}

if(c==1)

System.out.println("Not a Unique Number");

else

System.out.println("Unique Number");

}

}

•Java output attached

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Python Code:-

n=(int)(input("Enter a number:"))

n1,n2=n,n

c=0

while (n!=0):

d=n%10

while(n1!=0):

k=n1%10

if(d==k):

c+=1

n1//=10

n1=n2

n//=10

if(c==1):

print("Not a Unique Number")

else:

print("Unique Number")

•Python Output Attached

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Variable Description:-

1. n:- to accept Number from the user
2. n1 and n2:- to make copy of the same number
3. c:- Flag variable
4. d and k :- to extract the digits of the number