# MySQL PI() function

## PI() function

MySQL PI() returns the value of π(pi) which represents the ratio of the circumference of a circle to its diameter.

This function is useful in -

- PI() provides a precise and predefined value of π, which is necessary for various mathematical calculations involving circles, spheres, and trigonometric functions.
- In geometry and trigonometry, π is a fundamental constant used to calculate the properties of circles, such as area, circumference, and angles.
- In engineering and physics, π is frequently used in formulas related to waves, oscillations, rotations, and other physical phenomena.
- In computer graphics and visualization, π is used extensively for rendering curves, circles, and other geometric shapes.
- Many trigonometric functions (such as sine, cosine, and tangent) involve π in their formulas.
- The PI() function is crucial for accurate statistical calculations.
- In statistics, the normal distribution, which is a fundamental concept in probability theory, often involves π in its formulas.

**Syntax:**

PI();

**MySQL Version: 8.0**

**Pictorial presentation of MySQL PI() function**

**Example of MySQL PI() function**

Code:

```
SELECT PI();
```

**Explanation:**

The above MySQL statement returns the value of PI().

Output:

mysql> SELECT PI(); +----------+ | PI() | +----------+ | 3.141593 | +----------+ 1 row in set (0.00 sec)

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