---
title: "How to assign a null value to a calculated field?"
url: "https://openforis.support/questions/1381/how-to-assign-a-null-value-to-a-calculated-field"
tags: ["collect"]
status: "answered"
score: 0
answer_count: 1
asked: "2017-09-19T15:03:46"
last_activity: "2017-09-21T10:03:38"
source: "Open Foris Support - Q&A Forum"
license: "Copyright Open Foris, 2026. Some rights reserved under creative commons license."
---

# How to assign a null value to a calculated field?

Asked by flandsberg on 2017-09-19

Hi,

In certain instances, I want my calculated field to be assigned a null value. I cannot find the right syntax for it. Would anybody know?

Thanks,

Florence


## Answer (score 1, by Marcelo on 2017-09-21)

Link: https://openforis.support/questions/1381/how-to-assign-a-null-value-to-a-calculated-field/1382

Dear Florence,

Fields are assigned as null (na) when a condition you imposed for that attribute is not met. Therefore, if you need to set a value as null, you just create a condition "Apply when". If it is met, you get a value, if it is not, you get a null.

Let us know if it worked.
Marcelo