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Java Method Exercises: Display the factors of 3 in a given integer

Java Method: Exercise-21 with Solution

Write a Java method to display the factors of 3 in a given integer.

Pictorial Presentation:

Java Method Exercises: Display the factors of 3 in a given integer

Sample data:
(8) -> 8 = 8
(45) -> 45 = 3 * 3 * 5
(81) -> 81 = 3 * 3 * 3 * 3 * 1

Sample Solution:

Java Code:

import java.util.Scanner;
public class Main { 
 public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        System.out.print("Input an integer(positive/negative):");
        int n = in.nextInt();
        System.out.print("\nFactors of 3 of the said integer:\n");
        test(n);
        }

public static void test(int n){
    System.out.print(n + " = ");
    int result = n;
    while (result % 3 == 0){
        System.out.print("3 * ");
        result = result / 3;
    }
    System.out.print(result);
}
}

Sample Output:

Input an integer(positive/negative): 81

Factors of 3 of the said integer:
81 = 3 * 3 * 3 * 3 * 1

Flowchart :

Flowchart: Display the factors of 3 in a given integer

Java Code Editor:

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Previous Java Exercise: Extract the first digit from an integer.
Next Java Exercise: Check whether every digit of a given integer is even.

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Java: Tips of the Day

Prefer primitive classes

Wrapper classes are often slower than primitive classes. While Primitive class only has values, the wrapper class stores information about the entire class. Since the classes often deal with object values, comparing them with primitive classes does not give the desired results.

Ref: https://bit.ly/3eItLCN