是否有可能建立从在bash其他变量的变量名？ [英] Is it possible to build variable names from other variables in bash?

问题描述

我为pretty可怕的标题道歉 - 而质量差的后 - 但我基本上想要做的是这样的：

I apologise for the pretty terrible title - and the poor quality post - but what I basically want to do is this:

for I in 1 2 3 4
    echo $VAR$I # echo the contents of $VAR1, $VAR2, $VAR3, etc.

显然，上述不工作 - 这将（我认为）尝试和回声名为 $ VAR $ I 变量在Bash中这是可能的。

Obviously the above does not work - it will (I think) try and echo the variable called $VAR$I Is this possible in Bash?

推荐答案

是的，但不这样做。使用数组来代替。

Yes, but don't do that. Use an array instead.

如果你仍然坚持做这样的说法...

If you still insist on doing it that way...

$ foo1=123
$ bar=foo1
$ echo "${!bar}"
123

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