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Absolute path and relative path
In the program, there are two ways to express the file name: absolute path and relative path. The absolute path is the file name described without omitting the file name from the root. A relative path is a file name written relative to the current directory.
Examples of absolute and relative paths
| Twice | For Unix-like OS | For Windows |
| Absolute path example |
/home/yk/example1 |
c:\home\yk\example1.txt |
| Relative path example (* 1) | example1 | example1.txt |
* 1 When the current directories are "/ home/yk" and "c:\home\yk" respectively
How to interpret absolute paths and relative paths.
If the file name starts with /, it is interpreted as an absolute path, and if it does not start with /, it is interpreted as a relative path. Similar for Windows, if it starts with c:\(drivename \) it is interpreted as an absolute path, otherwise it is interpreted as a relative path.
What is the current directory?
The current directory is the directory that is the base point for relative path names. When executing from a command prompt or shell, the directory where the script is executed becomes the current directory.
File name and directory name cannot be distinguished from the name.
/ home/yk/example1 can be a directory or a file. If you say/home/yk/example1 /, it will always be the directory name. (For Windows, c:\home\yk\example1 \)