# Documentation/Calc Functions/MUNIT

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## Function name:

MUNIT

## Category:

Array

## Summary:

Returns the unitary square array of a certain size. The unitary array is a square array where the main diagonal elements equal 1 and all other array elements are equal to 0.

## Syntax:

MUNIT(**Dimensions**)

## Returns:

## Arguments:

**Dimensions** refers to the size of the array unit.

## Additional details:

You can find a general introduction to Array functions at the top of this page.

## Examples:

Select a square range within the spreadsheet, for example, from A1 to E5.

Without deselecting the range, select the MUNIT function. Mark the **Array** check box. Enter the desired dimensions for the array unit, in this case 5, and click **OK**.

You can also enter the =MUNIT(5) formula in the last cell of the selected range (E5), and press Shift + Ctrl + Enter.

You now see a unit array with a range of A1:E5.

More explanations on top of this page.