# Java Program to Convert Binary to Decimal2 min read

In this tutorial, we will write a java program to convert binary to decimal using while loop. Before that, you must have knowledge of the following topics in java.

### Binary number

The binary numbers are based on 0 and 1, so it is a base 2 number. They are the combination of 0 and 1. For example, 1001, 110101, etc.

### Decimal Number

These are the numbers with a base of 10, which ranges from 0 to 9. These numbers are formed by the combination of 0 to 9 digits such as 24, 345, etc.

Here is the chart where for the equivalent value of decimal and binary numbers.

Example:

`Input: 101 Output: 5Input: 111 Output: 7`

Now let us go through a program for the conversion of binary to decimal in java using while loop.

Before using a while loop, let us find the conversion of binary number to decimal number by using the parseInt() method of the Integer class.

`Enter a binary number:1001Equivalent Decimal Value: 9`

## Java Program to Convert Binary to Decimal using while loop

Output:

`Enter a binary number:1010Equivalent Decimal Value: 10`

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