Convert binary number to decimal number

Write a program to convert binary number to decimal number

Example:

Input:  binary[]={1,0,1,0}
Output: Decimal number is 10

Approach

C

#include <stdio.h>
#include <math.h>
int main()
{
    int binary[] = {1, 0, 1, 0};
    int decimal = 0;
    int len = sizeof(binary) / sizeof(binary[0]);
    for (int i = 0; i < len; i++)
    {
        decimal = decimal + binary[i] * pow(2, len - 1 - i);
    }
    printf("Decimal number is %d", decimal);
    return 0;
}

Java

public class DecimalToBinary {
    public static void main(String[] args) {
        int binary[] = { 1, 0, 1, 0 };
        int decimal = 0;
        int len = binary.length;
        for (int i = 0; i < len; i++) {
            decimal = (int) (decimal + binary[i] * Math.pow(2, len - 1 - i));
        }
        System.out.printf("Decimal number is %d", decimal);
    }
}

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