如何获取Bash变量中的第一个字母? [英] How to obtain the first letter in a Bash variable?

问题描述

我有一个Bash变量$word，有时它是一个单词或句子，例如:

I have a Bash variable, $word, which is sometimes a word or sentence, e.g.:

word="tiger"

或者:

word="This is a sentence."

如何创建一个新的Bash变量，该变量仅等于该变量中找到的第一个字母?例如，上面是:

How can I make a new Bash variable which is equal to only the first letter found in the variable? E.g., the above would be:

echo $firstletter
t

或者:

echo $firstletter
T

推荐答案

initial="$(echo $word | head -c 1)"

每次在问题描述中说第一"时，head是可能的解决方案.

Every time you say "first" in your problem description, head is a likely solution.

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