Added binToDec.java

Binary to Decimal conversion
Please review my code and merge it.
thank you!!

Author: gulatikeshav

binToDec.java

@@ -0,0 +1,27 @@
+import java.util.Scanner;
+
+public class binToDec {
+
+
+    public static void binToDecConversion(int binNum){
+        int myNum = binNum;
+        int pow = 0;
+        int decNum = 0;
+        
+        while(binNum > 0){
+            int lastDigit = binNum % 10;
+            decNum = decNum + (lastDigit * (int)Math.pow(2, pow));
+            pow++;
+
+            binNum = binNum / 10;
+        }
+        System.out.println("decimal of " + myNum + " = " + decNum);
+
+    }
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+
+        binToDecConversion(100);
+        sc.close();
+    }
+}