# Convert Decimal to Binary

• November 17, 2022
• C++

Given a decimal number as input, we need to write a program to convert the given decimal number into an equivalent binary number.

Examples:

``````
Input : 7
Output : 111

Input : 10
Output : 1010

Input: 33
Output: 100001``````
##### Algorithm for Converting Decimal to Binary:
• Step 1: Divide the number by 2 and store the remainder in an array (modulus operator).
• Step 2: Divide the number by 2 using the formula / (division operator)
• Step 3: Repeat step 2 until the result is greater than zero.

Program Code:

``````#include <iostream>
using namespace std;

void decimalToBinary(int n){
int arr[11], i = 0, num = n;

// Until the value of n becomes 0.
while(n != 0){
arr[i] = n % 2;
i++;
n = n / 2;
}
cout << num << " in Binary is ";

// Printing the array in Reversed Order.
for(i = i - 1; i >= 0;i--){
cout << arr[i];
}
cout << endl;
}
int main() {
int n = 156;
decimalToBinary(n);

return 0;
}
``````

Output:

``156 in Binary is 10011100``