(bc.info.gz) Relational Expressions
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Relational Expressions
======================
Relational expressions are a special kind of expression that always
evaluate to 0 or 1, 0 if the relation is false and 1 if the relation is
true. These may appear in any legal expression. (POSIX `bc' requires
that relational expressions are used only in `if', `while', and `for'
statements and that only one relational test may be done in them.) The
relational operators are
`expr1 < expr2'
The result is 1 if expr1 is strictly less than expr2.
`expr1 <= expr2'
The result is 1 if expr1 is less than or equal to expr2.
`expr1 > expr2'
The result is 1 if expr1 is strictly greater than expr2.
`expr1 >= expr2'
The result is 1 if expr1 is greater than or equal to expr2.
`expr1 == expr2'
The result is 1 if expr1 is equal to expr2.
`expr1 != expr2'
The result is 1 if expr1 is not equal to expr2.
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