# ISOWEEKNUM

Spread for WinForms provides advanced software components that support Excel import/export, full cell customization, an extensive calculation engine with over 450 functions and more, all with zero dependencies on Excel.

## Content



This function calculates the number ISO week number of the year for specified date.

## Syntax

ISOWEEKNUM(*date*)

## Arguments

Specify the *date* argument as a number (as in 37806), a string or reference to cell containg the information.

## Data Types

Accepts numeric or string data for both arguments. Returns numeric data.

## Examples

`ISOWEEKNUM("5/9/2015")` gives the result 19.

## Version Available

This function is available in Spread for Windows Forms 11.0 or later.