macos 终端命令：带有回声的循环
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Terminal Commands: For loop with echo
提问by Chris
I've never used commands in terminal like this before but I know its possible. How would I for instance write:
我以前从未在终端中使用过这样的命令，但我知道这是可能的。例如，我将如何写：
for (int i = 0; i <=1000; i++) {
echo "http://example.com/%i.jpg",i
}
回答by Simon
The default shell on OS X is bash. You could write this:
OS X 上的默认 shell 是 bash。你可以这样写：
for i in {1..100}; do echo http://www.example.com/${i}.jpg; done
Here is a link to the reference manual of bash concerning loop constructs.
这是有关循环结构的 bash 参考手册的链接。
回答by Gordon Davisson
for ((i=0; i<=1000; i++)); do
echo "http://example.com/$i.jpg"
done
回答by Cygnusx1
Is you are in bash shell:
您是否在 bash shell 中：
for i in {1..1000}
do
echo "Welcome $i times"
done
回答by thomas
jotwould work too (in bash shell)
jot也可以（在 bash shell 中）
for i in `jot 1000 1`; do echo "http://example.com/$i.jpg"; done
回答by Grimmace
By using jot:
通过使用jot：
jot -w "http://example.com/%d.jpg" 1000 1
回答by vishal
you can also use for loop to append or write data to a file. example:
您还可以使用 for 循环将数据追加或写入文件。例子：
for i in {1..10}; do echo "Hello Linux Terminal"; >> file.txt done
">>" is used to append.
“>>”用于追加。
">" is used to write.
">" 用于书写。
