Question

write a program to check whether a number is strontio number or not.( java)​

Answer 1

Question:-

• write a program in Java to check whether a number is strontio number or not

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•What is Strontio number?

Strontio number is a four digit number when multiplied by 2 gives the same digit in hundred and tens place.

Example:-

1386

1386×2=2772 [ Digits in Hundreds and Tens place are same ]

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Sample Input:-

1386

Sample Output:-

1386 is a Strontio Number

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Code:-

package Coder;

import java.util.*;

public class StrontioNumber {

public static void main(String[] args) {

Scanner sc=new Scanner (System.in);

System.out.print("Enter a four-digit number:");

int n=sc.nextInt();

if((n>999)&&(n<10000))

{

int n1=n;

n=n*2; //Multiplying the number by 2

n/=10; //Removing First Digit

n%=100; //Removing Last Digit

if((n/10)==(n%10))

System.out.println(n1+" is a Strontio Number");

else

System.out.println(n1+" is not a Strontio number");

}

else

System.out.println("Number is not a four digit number");

}

}

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•Output Attached

Answer 2

Required Answer:-

Question:

• Write a program to check whether a number is a Strontio number or not.

Code:

Here is the code.

import java.util.*;

public class StrontioNumber {

public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

System.out.print("Enter the number: ");

int n=sc.nextInt();

n=(n*2%1000)/10;

if(n%10==n/10)

System.out.println("Number is a Strontio Number.");

else

System.out.println("Number is not a Strontio Number.");

sc.close();

}

}

Logic:

• A number is said to be a strontio number which when multiplied by 2 gives same number in tens and hundreds place.
• Example: 1221, 1221 × 2 = 2442, 4 and 4 are same.

Output is attached.