Operators

TCL supports following type of operators:

Arithmetic: + - * / : These operators are performed like C
                           %: This operators is performed like Perl

Compare: > >= < <= == : These operators are performed like C, though can be used on both, numbers as well as contents of string.

Logical: Performed just like in C

Bitwise: ~ & | ^ : These are performed like in C and only on integers.

File: These are like file test operators in Unix.
Syntax: file option arg1 [...]

1. file readable file1
2. file writable file1
3. file executable file1
4. file exists file1
5. file isfile file1
6. file isdirectory file1
7. file attributes file1  ##gives description
8. file owned file1     ##returns true or false
9. file type file1         ##returns whether file or dir or char symbol or block symbol



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