# Change value on firebase **URL:** \ **Category:** Questions about Thunkable X\ **Tags:** firebase\ **Created:** [August 8, 2019, 8:14am UTC](https://community.thunkable.com/t/change-value-on-firebase/173827 "2019-08-08T08:14:05Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![saadndarabu977](https://avatars.discourse-cdn.com/v4/letter/s/a4c791/32.png) [@saadndarabu977](https://community.thunkable.com/u/saadndarabu977)\ **Post date:** [August 8, 2019, 8:14am UTC](https://community.thunkable.com/t/change-value-on-firebase/173827/1 "2019-08-08T08:14:05Z")
Hello! I have linked my app to firebase successfully and can view the data on my app. I want to enable users of my app to change a particular value on the application. For example: On firebase I have Consumers/ID/Balance And I want the users to be able to add a number on that value. I have attached a ss of my blocks and have no idea what I’m doing wrong. Please help!! ![help%20thunkable](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/b/1/b11786cb4ecb536f07417baee86d454d65a93aad.png) ---
**Author:** ![actech](https://avatars.discourse-cdn.com/v4/letter/a/3d9bf3/32.png) [@actech](https://community.thunkable.com/u/actech)\ **Post date:** [August 8, 2019, 8:41am UTC](https://community.thunkable.com/t/change-value-on-firebase/173827/2 "2019-08-08T08:41:15Z")
Hello, Value is a local variable whose value is defined only inside the block containing it ---
**Author:** ![saadndarabu977](https://avatars.discourse-cdn.com/v4/letter/s/a4c791/32.png) [@saadndarabu977](https://community.thunkable.com/u/saadndarabu977)\ **Post date:** [August 8, 2019, 10:42am UTC](https://community.thunkable.com/t/change-value-on-firebase/173827/3 "2019-08-08T10:42:41Z")
I declared a global variable “Balance” and then stored the firebase balance value as Balance. Now i did the addition to the global variable and then stored this variable as the firebase value of Balance. It still isn’t working ---
**Author:** ![actech](https://avatars.discourse-cdn.com/v4/letter/a/3d9bf3/32.png) [@actech](https://community.thunkable.com/u/actech)\ **Post date:** [August 8, 2019, 12:06pm UTC](https://community.thunkable.com/t/change-value-on-firebase/173827/4 "2019-08-08T12:06:34Z")
Have you enabled permission to write data to Firebase? Do you see the “error” variable in the blocks? I recommend that you always display the value of this variable on the screen. Otherwise, if an error occurs, it will be very difficult for you to understand what is happening. I will say more precisely - compile all the algorithms with error handling. In the documentation and on the forum, users often do not do this and spend a lot of time and effort on something that could be understood in 3 minutes if they were doing error handling. To effectively search for errors, use global variables such as “clouds” and listeners for them with the output of the results in a multi-line “Label”. Then you can control the values. For example, the “error” block, you can just assign the variable “cloud” ---
**Author:** ![ioannis](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/ioannis/32/146956_2.png) [@ioannis](https://community.thunkable.com/u/ioannis)\ **Post date:** [November 8, 2024, 12:11pm UTC](https://community.thunkable.com/t/change-value-on-firebase/173827/5 "2024-11-08T12:11:55Z")