JavaScript/forRepeat.html at master · BBoBBoM/JavaScript · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      /*

         왼쪽 기준 별 찍기
         // const a = "*";
        let blank = "";
        for (let i = 1; i < 10; i++) {
         for (let j = 0; j < i; j++) {
           blank += "*";
         }
         document.write(`${blank} `);
         document.write("<br>");
         blank = "";
       }*/

      let blank = ''
      //14
      // ' '공백 작동 안되서 &nbsp로 대체
      for (let i = 1; i < 15; i++) {
        for (let j = 15; j > i; j--) {
          blank += '&nbsp'
        }
        for(let k = 0; k<2*i-1;k++){
        blank +="*"
      }

      document.write(`${blank}`)

      document.write("<br>")
      blank = ''

      }

    </script>
  </body>
</html>