grkin

摘要： 学习操作符这个章节最好回忆一下C里的惯例，因为ECMAScript的标准很多继承自C的语法一元操作符只能操作一个值得操作符递增和递减操作符var age = 29;++age; //30var age = 29;age = age +1; //30var age = 29;--age; //28var age = 29 ;var anotherAge = –-age +2;alert (age); //28alert(anotherAge); //30var age = 29;age++; // 先求值再增加1var num1 = 2;var num2 = 20;var num3 = num1 阅读全文