Resolution, also known as display resolution or screen resolution, refers to the number of pixels in horizontal or vertical direction.
The screen size is the length of the diagonal line of the cell phone
1Inch (inch) =2.54 cm (CM)
The resolution of this cell phone is 1920×1080 pixels
The screen size (diagonal length) is 5.2 inches
3Screen pixel density
Screen pixel density, that is, the number of pixels per inch screen.
What is the relationship between screen pixel density, resolution and screen size?