Operator precedence determines the order in which operators are evaluated. Operators with higher precedence are evaluated first. A common example: 3 + 4 * 5 // returns 23 The multiplication operator ("*") has higher precedence than the addition operator ("+") and thus will be evaluated first...
4从左到右… || … 空值合并 (??)从左到右… ?? … 3条件(三元)运算符从右到左… ? … : … 2赋值从右到左… = … … += … … -= … … **= … … *= … … /= … … %= … … <<= … … >>= … … >>>= … ...
Operator precedence [Translate] Property accessors [Translate] Spread syntax [Translate] class expression [Translate] delete operator [Translate] function expression [Translate] function* expression [Translate] in operator [Translate] instanceof [Translate] new operator [Translate] new.target [Translate] ...
The comma (,) operator evaluates each of its operands (from left to right) and returns the value of the last operand. This is commonly used to provide multiple updaters to a for loop's afterthought.
式は以下の演算子を組み合わせたもので、標準的な[演算子の優先順位の規則](/ja/docs/Learn/JavaScript/First_steps/Math#operator_precedence")を使用します。 `calc()` 関数は1つの式を引数として取り、式の結果が値として使用されます。式は以下の演算子を組み合わせたもので、標準的な[演算子の...
URL:/zh-TW/docs/Web/JavaScript/Reference/Operators/Operator_precedence Title:運算子優先序 Flaw count: 1 broken_links: /zh-TW/docs/Web/JavaScript/Reference/Operators/Conditional_Operator is ill cased URL:/zh-TW/docs/Web/JavaScript/Reference/Operators/Optional_chaining ...
在一个表达式中进行多个运算时,每一部分都会按预先确定的顺序进行计算求解,这个顺序被称为运算符优先级。括号可改变优先级的顺序,强制优先处理表达式的某部分。括号内的操作总是比括号外的操作先被执行。但是在括号内,仍保持正常的运算符优先级。 当表达式有多种运算符时,先处理算术运算符,接着处理比较运算符,然后...
The comma (,) operator evaluates each of its operands (from left to right) and returns the value of the last operand. This is commonly used to provide multiple updaters to a for loop's afterthought.
The comma (,) operator evaluates each of its operands (from left to right) and returns the value of the last operand. This is commonly used to provide multiple updaters to a for loop's afterthought.
Learn more about the behavior of JavaScript's operatorsinstanceof,typeof,new,this, theoperator precedence, and more. Statements and declarations Learn howdo-while,for-in,for-of,try-catch,let,var,const,if-else,switch, and more JavaScript statements and keywords work. ...