Example: C program to convert decimal to binary without using array

C
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Java
Python
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// C program to convert decimal to binary without using array
#include <stdio.h>

// The main function of the program
int main()
{
    // Step-1 Declare variables
    int num;
    long long binary = 0;
    int remainder, place = 1;

    // Step-2 Input a decimal number from the user
    printf("Enter a decimal number: ");
    scanf("%d", &num);

    // Step-3 Convert decimal to binary manually using loop
    while(num != 0) {
        remainder = num % 2;
        binary += remainder * place;
        num /= 2;
        place *= 10;
    }

    // Step-4 Output the binary number
    printf("Binary representation: %lld\n", binary);

    return 0;
}