// 不用函数
let str1 = "hello world how are you";
let f = str1.split(" ");
for (let i = 0; i < f.length; i++) {
f[i] = f[i].split("")[0].toUpperCase() + f[i].slice(1);
}
document.write(f.join(" ") + "<br>");
// 用函数
function fun1(str2) {
return str2[0].toUpperCase() + str2.slice(1);
}
function fun2(str2) {
var arr = str2.split(" ");
var str3 = "";
for (let i = 0; i < arr.length; i++) {
str3 += fun1(arr[i]) + " ";
}
str3 = str3.slice(0, -1);
return str3;
}
document.write(fun2("hello world how are you") + "<br>"+ "<hr>");
