Bash程序在运行时退出，无论什么[重复]

Question

这个问题在这里已有答案：

• Why equal to operator does not work if it is not surrounded by space? 4个答案
• Why is [ “$foo”==“$bar” ] always true in bash? [duplicate] 1回答

如果用户输入'q'，我试图让脚本退出

这是代码：

echo "Enter Choice => "
    read target
if [[ $target=='q' ]]; then
  exit 1
else
  #do something
fi

但是当我运行它时无论输入是什么，脚本都会退出...

Answer 1

#!/bin/bash
echo "Enter Choice => "
    read target
if [[ $target == 'q' ]]; then
  exit 1
else
  #do something
  echo "do something..."
fi

~                            

试试这个 - 令牌$ target，'=='和'q'之间的间距很重要。