###
Convert Binary to Decimal number in Java. OR

Write a program to convert Binary to Decimal number in Java.

Given a Binary number, Convert it to Decimal number. Lets see what is the input and expected output.

### Algorithm

**Converting Binary to Decimal number is very easy,**

**Step 1:**Get the Right most bit and check whether it is set or not.

For getting the Right most bit, Mod the number by 10.

**(number % 10)**.

**Step 2:**

If the Right most bit is set, then get the corresponding value of that position using the formula

**Math.pow(2, indexPosition)**and add it to variable sum.

If the Right most bit is not set, then no need to do anything and no value will be added to variable sum.

**Step 3:**After the Right most bit is checked, Divide the number by 10 to get the remaining number for next iteration. Also Increment

**indexPosition.**

**(number/10) and**

**indexPosition++.****Continue until number is > 0.**

### Convert Binary to Decimal number in Java.

public class ConvertBinaryToDecimal { public static void main(String[] args) { System.out.println(binaryToInt(101)); } public static int binaryToInt(int number){ int index = 0; int sum = 0; while (number > 0){ int lastBit = number % 10; //Get last bit of binary number sum += Math.pow(2, index) * lastBit; //sum all corresponding position value. //lastBit will be either 1 or 0 as it is binary number, so if bit is not set that is 0, then that value will be 0. //If bit is set that is 1, then we sum value of corresponding position using Math.pow(2, index). number = number/10; //we already checked last bit above, so discard it in next iteration. index++; //Increment index for next position. } return sum; } }

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**Enjoy !!!!**

**If you find any issue in post or face any error while implementing, Please comment.**

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