模板字符串(template string)
绑定变量${}
var name="ssss"
var age="3"
var lian='my name is'+name+'i am'+age;
console.log(lian);//my name isssssi am3
var lian1=`my name is${name}i am${age}`;
console.log(lian1)//my name isssssi am3
let a=1;
let b=2;
let abb=`${a}+${b}=${a+b}`;
console.log(abb);//1+2=3
let x = 1;
let y = 2;
let sumTpl = "" + x + " + " + y + " = " + (x + y);
console.log(sumTpl); // 1 + 2 = 3
支持多行和换行
let shi = `chun
xia
qiu
dong`;
console.log(shi); // chun
// xia
// qiu
// dong
//普通数组不支持多行或换行
//加/n 可以换行
let shi1= "chun \n xia \n qiu \n dong"
console.log(shi1)// chun
// xia
// qiu
// dong