例如，将算术运算符(如+)施加于某个元素时，该运算符会自动提取该元素的数值。

For example, arithmetic operators such as +, when applied to an element, automatically extract the numeric value of the element.

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一元运算符对单个操作数执行操作，如返回数值表达式的负值或正值。

Unary operators perform an operation on a single operand, such as returning the negative or positive value of a numeric expression.

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运算数：运算符来进行运算操作的数值。

One of the values on which an operator operates.

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注意数值型的字面值不包括符号(译注：正负号)，像-1实际上是个组合了一元运算符“-”和字面值1的表达式。

Note that numeric literals do not include a sign; a phrase like -1 is actually an expression composed of the unary operator '-' and the literal 1.

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注意数值型的字面值不包括符号(译注：正负号)，像-1实际上是个组合了一元运算符“-”和字面值1的表达式。

Note that numeric literals do not include a sign; a phrase like -1 is actually an expression composed of the operator - and the literal 1.

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表达式可以使用在常数值、命令的退出代码、字符串、宏和文件系统路径上使用的运算符。

Expressions can use operators that act on constant values, exit codes from commands, strings, macros, and file-system paths.

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运算符对数值执行常见计算，其中包括将数值的位模式移位。

Arithmetic Operators perform familiar calculations on numeric values, including shifting their bit patterns.

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运算符对数值执行常见计算，其中包括将数值的位模式移位。

Arithmetic Operators perform familiar calculations on numeric values, including shifting their bit patterns.

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