创建字符串“pencil，pen,ballpen,eraser,parper,ruler,book,bag”

创建字符串 "pencil，pen,ballpen,eraser,parper,ruler,book,bag" 的步骤通常是将各个单词放入一个数组或列表，然后使用逗号和空格作为分隔符连接起来。以下是这个字符串在某些编程语言中的创建方法：

**示例1 - Python:**

words = ["pencil", "pen", "ballpen", "eraser", "parper", "ruler", "book", "bag"]
string = ", ".join(words)

**示例2 - Java:**

String[] words = {"pencil", "pen", "ballpen", "eraser", "parper", "ruler", "book", "bag"};
StringBuilder sb = new StringBuilder();
for (String word : words) {
    sb.append(word).append(",");
}
sb.setLength(sb.length() - 1); // 移除最后一个逗号
String string = sb.toString();

**示例3 - JavaScript:**

let words = ["pencil", "pen", "ballpen", "eraser", "parper", "ruler", "book", "bag"];
let string = words.join(", ");