Java Program to Convert a Decimal Number to Binary Number using Arrays as Stacks

Given an Integer number convert into Binary Number using arrays as a stack.

Example:

Input : 10
Output: 1010
Input : 16
Output: 10000

Approach:

Divide the number by 2 and store the remainder of the number in the array.
Divide the number by 2.
Repeat the process until the number becomes zero.
Print the array in reverse order.

Java

// Java Program to Convert a Decimal Number
// to Binary Number using Arrays as Stacks
 
import java.util.*;
public class DecimalToBinary 
    static int arr[] = new int[1000];
 
    // maintaining count variable
    // as the top of the stack
    static int count;
 
    // push at the count index and increment the count
    public static void push(int n) 
      arr[count++] = n;
    
 
    // pop all the elements starting
    // from count-1 till 0
    public static void pop()
    
        for (int i = count - 1; i >= 0; i--) 
            System.out.print(arr[i]);
        
    
 
    public static void main(String args[])
    
        int num = 46;
 
        while (num > 0) 
            int r = num % 2;
            push(r);
            num /= 2;
        
 
        System.out.print("Binary equivalent: ");
 
        pop();
    

Output

Binary equivalent: 101110

Time complexity: O(logn) for given input number n

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