//让用户输入行数，使用for循环嵌套打出正着的星星来，行数等于用户输入的数字
//例如：用户输入6
// *
// ***
// *****
// *******
// *********
// ***********
let readline = require("readline-sync");
console.log("请输入行数");
let line = readline.question("");
let strSpace = "";
let strStar = "";
let str = "";
for (let i = 1; i <= line; i++) {
for (let j = 1; j <= line - i; j++) {
strSpace = strSpace + " ";
}
for (let k = 1; k <= 2 * i - 1; k++) {
strStar = strStar + ‘*‘;
}
str = strSpace + strStar;
console.log(str);
str = "";
strSpace = "";
strStar = "";
}
