November 2005
Beginner to intermediate
528 pages
24h 11m
English
Content preview from Mac OS X Tiger in a Nutshell
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Operators
bash uses arithmetic operators from the C programming language; the following list is in decreasing order of precedence. Use parentheses to override precedence.
Table 5-31. Arithmetic operators
|
Operator |
Meaning |
|
|
Unary minus |
|
|
Logical negation; binary inversion (one’s complement) |
|
|
Multiplication; division; modulus (remainder) |
|
|
Addition; subtraction |
|
|
Bitwise left shift; bitwise right shift |
|
|
Less than or equal to; greater than or equal to |
|
|
Less than; greater than |
|
|
Equality; inequality (both evaluated left to right) |
|
|
Bitwise AND |
|
|
Bitwise exclusive OR |
|
|
Bitwise OR |
|
|
Logical AND |
|
|
Logical OR |
|
|
Assign value |
|
|
Reassign after addition/subtraction |
|
|
Reassign after multiplication/division/remainder |
|
|
Reassign after bitwise AND/XOR/OR |
|
|
Reassign after bitwise shift left/right |
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