(bc.info.gz) Boolean Expressions
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Boolean Expressions
===================
Boolean operations are also legal. (POSIX `bc' does NOT have
boolean operations). The result of all boolean operations are 0 and 1
(for false and true) as in relational expressions. The boolean
operators are:
`!expr'
The result is 1 if expr is 0.
`expr && expr'
The result is 1 if both expressions are non-zero.
`expr || expr'
The result is 1 if either expression is non-zero.
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