数字楼梯-嵌套循环

Question

我正在尝试

仅使用嵌套循环和if语句。

for (let i = 0; i < 10; i++) {
  for (let j = 0; j < 10; j++) {
    if (j < i) {
      document.write(j + " ");
    }
  }
  document.write("<br>");
}

但是，输出与我想要的不同（尝试运行代码段）。

Answer 1

您必须使用from django.db import models class CHRecord(models.Model): namespace = models.CharField(max_length=32) filepath = models.FileField() # Not sure what this represents in your question, but if you use # PostgreSQL as your backend, might want an Array sel_sets = models.CharField(max_length=512) # Saves a row to a database (local SQLite by default) CHRecord.objects.create(namespace="John:", filepath="C:/temp/", sel_sets="xyz") # Get matching rows translating to a SQL query CHRecord.objects.filter(namespace__contains="John") 的值来计算要打印的数字

tasks:
  - include_role:
      name: repos.linux
      apply:
        tags:
          - install
          - check

Answer 2

这样，您将不需要IF语句：

for (var i = 0; i < 10; i++) {
    for (var j = 0; j <= i; j++) {
        document.write(j * i, ' ')
    }
    document.write('<br>')
}