﻿ Java exercises: Check whether a given number is an ugly number - w3resource

# Java Exercises: Check whether a given number is an ugly number

## Java Numbers: Exercise-1 with Solution

Write a Java program to check whether a given number is an ugly number.

In number system, ugly numbers are positive numbers whose only prime factors are 2, 3 or 5. First 10 ugly numbers are 1, 2, 3, 4, 5, 6, 8, 9, 10, 12. By convention, 1 is included.

Test Data: Input an integer number: 235

Pictorial Presentation: Sample Solution:

Java Code:

``````import java.util.Scanner;
public class Exercise1 {
public static void main(String[] args){
Scanner in = new Scanner(System.in);
System.out.print("Input an integer number: ");
int n = in.nextInt();
if (n <= 0) {
System.out.print("Input a correct number.");
}
int x = 0;
while (n != 1) {
if (n % 5 == 0) {
n /= 5;
} else if (n % 3 == 0) {
n /= 3;
} else if (n % 2 == 0) {
n /= 2;
} else {
System.out.print("It is not an ugly number.");
x = 1;
break;
}
}
if (x==0)
System.out.print("It is an ugly number.");
System.out.print("\n");
}
}
```
```

Sample Output:

```Input an integer number: 235
It is not an ugly number.
```

Flowchart: Java Code Editor: