How to include the LiquidCrystal_I2C library?

Can someone give me a link to download the LiquidCrystal_I2C library.

There are several versions of the LiquidCrystal_I2C library. They all have the same name but may be different in implementation. Many are not maintained any more. Do you know which version?

I use the hd44780 library. It is the best library available for HD44780 controlled LCDs. It is actively maintained. It has many features that make it the best. It is faster. It will automatically determine the I2C address and the LCD to I2C backpack pin mapping making the LCD nearly completely plug and play. The library is available through the IDE library manager. The class that you want to use is the hd44780_I2Cexp class. There are examples to show how to use the library. In the examples, there is a diagnostic sketch that will help us to help you if you still have trouble with the display. Run the diagnostic sketch and post the results.

If you have code that uses the LiquidCrystal_I2C library and have trouble getting it to work with the hd44780 library, post the code and I (or someone) will help you to make the change.

This is my one can you give my library for it?

I already did. Use the hd44780 library. That is an I2C backpack and the hd44780 library will work great with it.

Or if you insist on using a LiquidCrystal library, just do a Google search and you will find several. No guarantees on how well any will work, though.

Can you send the link to download it?

To install the hd44780 library. The hd44780 library is the best available for I2C LCDs. The library is available in the Library Manager. Go to Library Manager (in the IDE menus, Sketch, Include Libraries, Manage Libraries) and in the Topics dropdown choose Display and in the Filter your search box enter hd44780. Select and install the hd44780 library by Bill Perry.

Always install libraries through the Library Manager if possible. They will be installed correctly that way.