# Difference between revisions of "Documentation/How Tos/Calc: SQRT function"

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## Revision as of 08:11, 3 May 2010

## SQRT

Returns the positive square root of a number.

### Syntax:

**SQRT(number)**

- Returns the positive square root of
.**number** -
must be positive.**number**

### Example:

**SQRT(16)**

- returns
.**4**

**SQRT(-16)**

- returns an
*invalid argument*error.