Java program to reverse a number

  • on February 4, 2019
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Hello friends! welcome to my blog
Today will discuss the basic concept and simplest way to how to reverse a number in java by programming and how to make program for reverse of a number without array in java programming. How to how to count number of digit in a number in java programming, write a program to count number of digit in java

Write a program to reverse a number

import java.util.Scanner;
public class reverse{
public static void main(String[] args){
int n, r=0,d;
    Scanner in =new Scanner(System.in);
    System.out.println(“Enter the number”);
n=in.nextInt();
System.out.println(“Number befour reverse= ” +n);
while(n>0){
d= n%10;
r= r*10+d;
n=n/10;
}
System.out.println(“Number After reverse= “+r);
}
}

Output: Enter the Number
        1234
Number befour reverse= 1234
Number After reverse= 4321

Write a program to count no of digit of a number

import java.util.Scanner;
public class count{
public static void main(String[] args){
int n, c=0,d;
    Scanner in=new Scanner(System.in);
    System.out.println(“Enter the number”);
n=in.nextInt();
while(n>0){
d= n%10;
n=n/10;
c++;
}
System.out.println(“The entered number has “+ d +”digit”);
}
}

Output: Enter the Number
            1234
   The entered number has 4 digit

 

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