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7.9 Relational and type-testing operators

Visual Studio .NET 2003

The ==, !=, <, >, <=, >=, is and as operators are called the relational and type-testing operators.

relational-expression:
shift-expression
relational-expression   <   shift-expression
relational-expression   >   shift-expression
relational-expression   <=   shift-expression
relational-expression   >=   shift-expression
relational-expression   is   type
relational-expression   as   type
equality-expression:
relational-expression
equality-expression   ==   relational-expression
equality-expression   !=   relational-expression

The is operator is described in Section 7.9.9 and the as operator is described in Section 7.9.10.

The ==, !=, <, >, <= and >= operators are comparison operators. For an operation of the form x op y, where op is a comparison operator, overload resolution (Section 7.2.4) is applied to select a specific operator implementation. The operands are converted to the parameter types of the selected operator, and the type of the result is the return type of the operator.

The predefined comparison operators are described in the following sections. All predefined comparison operators return a result of type bool, as described in the following table.

Operation Result
x == y
true if x is equal to y, false otherwise
x != y
true if x is not equal to y, false otherwise
x < y
true if x is less than y, false otherwise
x > y
true if x is greater than y, false otherwise
x <= y
true if x is less than or equal to y, false otherwise
x >= y
true if x is greater than or equal to y, false otherwise
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