# SQR: Your Square Root Sidekick

Need to find the square root of a number? Look no further than the `SQR`

command, your trusty square root sidekick! This mathematical marvel takes any non-negative number and reveals its square root – that is, the value that, when multiplied by itself, equals the original number. It's like having a pocket calculator with a dedicated square root button, ready to help you solve all sorts of geometric, algebraic, and everyday problems!

### Syntax

```
SQR(<number>)
```

Where:
- `<number>`

: The non-negative numeric value for which you want to find the square root. If you try to use a negative number, you'll get an `?ILLEGAL QUANTITY ERROR`

message.

### Applications

The `SQR`

command is your go-to tool when:

**Working with geometry:**Calculate the length of a side in a right triangle using the Pythagorean theorem (a² + b² = c²).**Solving quadratic equations:**Find the roots of quadratic equations using the quadratic formula.**Calculating distances:**Determine the distance between two points in a coordinate system.**Scaling graphics:**Resize images or sprites by calculating scaling factors based on square roots.

### Code Examples

**1. Simple Square Root Calculation:**

```
10 X = 16
20 Y = SQR(X) :rem Y stores the square root of X
30 PRINT Y :rem Output: 4
```

This example demonstrates how to find the square root of 16.

**2. Pythagorean Theorem:**

```
10 INPUT "Enter length of side A: "; A
20 INPUT "Enter length of side B: "; B
30 C = SQR(A*A + B*B) :rem Calculate the hypotenuse C
40 PRINT "Hypotenuse: "; C
```

Here, `SQR`

is used in the Pythagorean theorem to calculate the length of the hypotenuse of a right triangle.

### SQR in the Wild: The Carpenter's Helper

Imagine you're a carpenter building a diagonal brace for a square frame. The `SQR`

command can help you calculate the exact length of the brace, ensuring a perfect fit.

Don't get stuck on square one! With `SQR`

in your Commodore 64 toolkit, you can easily conquer square roots and tackle a wide range of mathematical challenges. It's like having a personal math tutor ready to help you with your calculations. So embrace the power of `SQR`

and let it be your guide to a world of square roots and beyond!