## Find the perimeter of a square

Write a method that will ask for a user to input the length of one side of a square and outputs the squares perimeter.

Example 1:

```
input data:
5
output:
20
```

Example 2:

```
input data:
21
output:
84
```

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Seda Kunda is a web designer and developer with a degree in Computer Science and a great passion for code. Besides code, she enjoys pepperoni pizza, watching the bachelor and sleeping in on Saturdays.