Example: C program to convert decimal to binary using a function

C
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Java
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// C program to convert decimal to binary using a function
#include <stdio.h>

// Step-1 Function to convert decimal to binary
long long convertToBinary(int num)
{
    long long binary = 0;
    int place = 1;

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

    return binary;
}

// The main function of the program
int main()
{
    // Step-2 Declare variables
    int num;
    long long binary;

    // Step-3 Input a decimal number from the user
    printf("Enter a decimal number: ");
    scanf("%d", &num);

    // Step-4 Call the function and store the result
    binary = convertToBinary(num);

    // Step-5 Output the result
    printf("Binary representation: %lld\n", binary);

    return 0;
}