let str = "Hello World!";
console.log(str.startsWith("Hello"));
console.log(str.endsWith("World!"));
console.log(str.includes("Wor"));
console.log(str.repeat(2));
console.log(str.padStart(20, 'c'));
console.log(str.padEnd(20, 'm'));
console.log(str.padStart(5, 'c'));
console.log(str.padEnd(20, 'abcde'));
console.log(str.padEnd(20));
var name = "cm", age=29;
var str2 = "姓名:" + name + ",年龄:" + age + "。"
console.log(str2);
let str3 = `姓名:${name},年龄:${age}。`;
let str4 = `姓名:${name},
年龄:${age}。`;
console.log(str4);
let str5 = `${1+2+3}`;
console.log(str5);
function fn() {}
let str6 = `${fn()}`;
console.log(str6);
let a=1, b=2;
function fn2() {
for(let i=0; i<arguments.length; i++) {
console.log(arguments[i]);
}
}
fn2`xxx${a}yyy${b}`
console