# Value 0 not considered
**URL:** https://discourse.nodered.org/t/value-0-not-considered/74413
**Category:** General
**Created:** [30 January 2023 12:34 UTC](https://discourse.nodered.org/t/value-0-not-considered/74413 "2023-01-30T12:34:38Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Giamma](https://discourse.nodered.org/u/Giamma)
#### Post date: [30 January 2023 12:34 UTC](https://discourse.nodered.org/t/value-0-not-considered/74413/1 "2023-01-30T12:34:38Z")
I try to explain ....
In my dashboard I show the current temperature and the lowest temperature of the day.
This morning the current temperature was 0 and I set the var tempEsternaMinPrec to 0 because it was the lowest temperature of the day.
When the temperature is increased to 0.1 the var tempEsternaMinPrec had to remain to 0 but the second function is failed because the value temp is set to 30 and not 0.
if I delete the default value (30) then the function works fine ....
Where is the problem?
first node
```auto
flow.set("tempEsternaMinPrec", 0);
```
second node
```auto
const output = [null];
const temp = flow.get("tempEsternaMinPrec") || 30
node.status(temp)
const x = 0.1
if (x < temp) {
output[0] = { payload: x }
}
return output;
```
---
### Author:  [@E1cid](https://discourse.nodered.org/u/E1cid)
#### Post date: [30 January 2023 12:40 UTC](https://discourse.nodered.org/t/value-0-not-considered/74413/2 "2023-01-30T12:40:55Z")
> [@Giamma](#):
>
> ```auto
> const temp = flow.get("tempEsternaMinPrec") || 30
>
> ```
0 is considered falsy so the above, if the flow.get returns 0, it will set to 30.
try below, as it's a test for nullish values.
[Nullish coalescing operator (??) - JavaScript | MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing)
```auto
const temp = flow.get("tempEsternaMinPrec") ?? 30
```
Needs nodejs 14+
---
### Author:  [@Giamma](https://discourse.nodered.org/u/Giamma)
#### Post date: [30 January 2023 12:51 UTC](https://discourse.nodered.org/t/value-0-not-considered/74413/3 "2023-01-30T12:51:49Z")
It's works fine .... thank you very much!
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [13 February 2023 12:52 UTC](https://discourse.nodered.org/t/value-0-not-considered/74413/4 "2023-02-13T12:52:11Z")
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