# sqrt

## Returns the square root of val. Val cannot be a
negative value.

**Syntax:**

sqrt(val);

Argument |
Description |

val |
The number to get the square root of. |

**Returns:** Real

### Description

If you multiply a number with itself, you get the square of that
number, but sometimes you want to do the reverse and get the square
root of a number. So to find what number has been multiplied with
itself to get any given *positive* value we use this function.
For example: `sqrt(9)` will return 3 since 3*3=9.

**Example:**

num = sqrt(exp);

The above code will set the variable "num" to hold the square
root of the value contained in "exp".

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