How to use the Linux shell if condition statement

Shell if

-B Returns True when file exists and is a block file
-C Returns True when file exists and is a character
-D returns True when pathname exists and is a directory
-E Returns True when a file or directory specified by pathname is present
-F Returns True when file exists and is regular
-G returns True when the file or directory specified by pathname is present and the Sgid bit is set
-H Returns True when file exists and is a symbolic link file, this option is not valid on some old systems
-K returns True when a file or directory specified by pathname exists and the "sticky" bit is set
-P Returns True when file exists and is a command pipeline
-R Returns True when the file or directory specified by pathname is present and readable
-s when file size is larger than 0 o'clock returns true
-U returns True when the file or directory specified by pathname is present and the SUID bit is set
-W Returns True when the file or directory specified by pathname exists and is executable. A directory must be executable for its content to be accessed.
-O Returns True when the file or directory specified by pathname is present and is owned by the user specified by the active user ID of the current process.

Compare character notation:
-eq equals
-ne Not equal to
-GT Greater than
-lt less than
-le less than or equal to
-ge greater than or equal to
-Z Empty string
* = Two characters equal
*! = Two characters Range
*-N Non-empty string

How to use the Linux shell if condition statement