LCD screen to read data output from Arduino

I am measuring mass with load cells and I need the mass to display on a I2C 1602 LCD screen using an Arduino. Do I have to create a function or is there one for me to download?
Also, can everything be on the same script? The calibration of mass and the LCD function?

Thank you

There are several LCD libraries in the IDE library manager. The one by Bill Perry is highly regarded. IDE -> sketch/include library/manage libraries

Yes, providing the sketch is structured correctly and delay() is avoided

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