Convert binary number `1010` into decimal number.

Explanation

To convert the binary number `1010` into a decimal number, we follow these steps:

### Step-by-Step Solution:

1. **Identify the binary number**: The binary number given is `1010`.

2. **Assign powers of 2**: Starting from the rightmost digit (which is the least significant bit), assign powers of 2 to each digit:
- The rightmost digit (0) is \(2^0\)
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