7) 条件(三元)运算符(Conditional operator [kənˈdɪʃənəl) 8) 逗号运算符(Comma operator [ˈkɑ:mə]) 9) 一元运算符(Unary operators [ˈju:nəri]) 10) 关系运算符(Relational operator [rɪ'leɪʃənl]) 1. 赋值运算符(Assignment operators) 一个赋值运算符将它右...
代码语言:javascript 复制 Operator: x = y 示例 代码语言:javascript 复制 // Assuming the following variables // x = 5 // y = 10 // z = 25 x = y // x is 10 x = y = z // x, y and z are all 25 加赋值(Addition assignment) 加赋值运算符把一个右值与一个变量相加,然后把相加...
TheAddition Assignment Operator(+=) adds a value to a variable. Assignment letx =10; x +=5; Try it Yourself » OperatorExampleSame As =x = yx = y +=x += yx = x + y -=x -= yx = x - y *=x *= yx = x * y
OperatorNameExample = Assignment Operator a = 7; += Addition Assignment a += 5; // a = a + 5 -= Subtraction Assignment a -= 2; // a = a - 2 *= Multiplication Assignment a *= 3; // a = a * 3 /= Division Assignment a /= 2; // a = a / 2 %= Remainder Assignment ...
The += Operator TheAddition Assignment Operatoradds a value to a variable. Addition Assignment Examples letx =10; x +=5; Try it Yourself » lettext ="Hello"; text +=" World"; Try it Yourself » The -= Operator TheSubtraction Assignment Operatorsubtracts a value from a variable. ...
10) 关系运算符(Relational operator [rɪ'leɪʃənl]) 1. 赋值运算符(Assignment operators) 一个赋值运算符将它右边操作数的值赋给它左边的操作数。 最简单的赋值运算符是等于(=),它将右边的操作数值赋给左边的操作数。那么 x = y 就是将 y 的值赋给 x。
八、Compound Assignment with Augmented Addition用扩增法赋综合值 a = a + 12 可写作 a += 12 九、Compound Assignment with Augmented Subtraction用扩减法赋综合值 a = a - 12 可写作 a -= 12 十、Compound Assignment with Augmented Multiplication用扩乘法赋综合值 ...
复合赋值 Compound Assignment +=,-=,*=,`/=`` +=称为“addition assignment operator。 还可以使用+=运算符来拼接字符串到现有字符串变量的结尾。 let myVar = 1; myVar += 5; myVar -= 1; myVar *= 1; myVar /= 1; let myStr = "This is the first sentence."; ...
(available as part of Firefox 2) under the name "destructuring assignment". Destructuring in JS is more general, as it can be used in contexts other than assignment, such asfunction definitions & callsandloop initializers.Destructuring assignmenthas been a proposed addition to ECMAScript (the ...
function Expression(str) { if (...) { return new Addition(..); } else if (...) { return new Multiplication(...); } else { throw new ExpressionException(...); } } ... var expr = new Expression(someStr); 这是个好消息:JavaScript 构造函数不会将你锁定,因此您可以随时改变构造函数...