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This article mainly explains the "detailed introduction of the VBScript operator". The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "the detailed introduction of the VBScript operator".

VBScript has a complete set of operators, including arithmetic operators, comparison operators, join operators, and logical operators.

Operator precedence

When an expression contains multiple operators, each part is evaluated in a predetermined order, which is called operator precedence. You can use parentheses to cross this order of precedence and force some parts of the expression to be evaluated first. When operating, always execute the operators in parentheses before the operators outside the parentheses. However, the standard operator precedence is still followed in parentheses.

When an expression contains multiple operators, the arithmetic operator is evaluated first, then the comparison operator is evaluated, and finally the logical operator is evaluated. All comparison operators have the same priority, that is, the comparison operators are calculated from left to right. The precedence of arithmetic and logical operators is as follows:

Arithmetic operator comparison operator logical operator description symbol power ^ equal to logical non-Not negative sign-not equal to logical and And multiplication * less than logical exception or Xor division\ less than or equal to = logical implied Imp plus + object reference comparison Is minus-string concatenation &

When the multiplication sign and division sign appear in the same expression at the same time, the multiplication and division operators are calculated from left to right. Similarly, when addition and subtraction appear in the same expression at the same time, the addition and subtraction operators are calculated from left to right.

The string concatenation (&) operator is not an arithmetic operator, but it comes after all arithmetic operators and before all comparison operators in precedence order. The Is operator is an object reference comparison operator. It does not compare objects or their values, but simply checks to determine whether two object references refer to the same object.

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