bc: Relational Expressions

1 
1 3.3 Relational Expressions
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1 
1 Relational expressions are a special kind of expression that always
1 evaluate to 0 or 1, 0 if the relation is false and 1 if the relation is
1 true.  These may appear in any legal expression.  (POSIX 'bc' requires
1 that relational expressions are used only in 'if', 'while', and 'for'
1 statements and that only one relational test may be done in them.)  The
1 relational operators are
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1 'expr1 < expr2'
1      The result is 1 if expr1 is strictly less than expr2.
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1 'expr1 <= expr2'
1      The result is 1 if expr1 is less than or equal to expr2.
1 
1 'expr1 > expr2'
1      The result is 1 if expr1 is strictly greater than expr2.
1 
1 'expr1 >= expr2'
1      The result is 1 if expr1 is greater than or equal to expr2.
1 
1 'expr1 == expr2'
1      The result is 1 if expr1 is equal to expr2.
1 
1 'expr1 != expr2'
1      The result is 1 if expr1 is not equal to expr2.
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