2020.11.08 JavaScript字符串
字符串可以存储一系列字符,如 "John Doe"。
字符串可以是插入到引号中的任何字符。可以使用单引号或双引号:
var carname = "Volvo XC60";
var carname = 'Volvo XC60';
var carname = 'Volvo XC60';
可以使用索引位置来访问字符串中的每个字符:
var character = carname[7];
字符串的索引从 0 开始,这意味着第一个字符索引值为 [0],第二个为 [1], 以此类推。
可以在字符串中使用引号,字符串中的引号不要与字符串的引号相同:
var answer = "It's alright";
var answer = "He is called 'Johnny'";
var answer = 'He is called "Johnny"';
var answer = "He is called 'Johnny'";
var answer = 'He is called "Johnny"';
也可以在字符串添加转义字符来使用引号:
var x = 'It\'s alright';
var y = "He is called \"Johnny\"";
var y = "He is called \"Johnny\"";