Binary to Decimal (Type-Hard)

// Recursive Java program to convert binary  
// decimal 
  
  
class GFG 
{ 
    static int toDecimal(String binary,int i) 
    { 
        // If we reached last character 
        int n = binary.length(); 
        if (i == n-1) 
        return binary.charAt(i) - '0'; 
          
        // Add current tern and recur for 
        // remaining terms 
        return ((binary.charAt(i) - '0') << (n-i-1)) + 
                toDecimal(binary, i+1); 
    } 
      
    // Driver code 
    public static void main(String []args) 
    { 
        String binary = "1010"; 
        int i=0; 
        System.out.println(toDecimal(binary,i)); 
          
    } 
  
} 
  
// This code is contributed  
// by Yogii7664 (Yogesh Soni)