bash - 如何在Bash中连接字符串变量(How to concatenate string variables in Bash)

Question

In PHP, strings are concatenated together as follows:

(在PHP中，字符串按以下方式串联在一起：)

$foo = "Hello";
$foo .= " World";

Here, $foo becomes "Hello World".

(在这里， $foo变成“ Hello World”。)

How is this accomplished in Bash?

(如何在Bash中完成？)

  ask by Strawberry translate from so

Answer 1

foo="Hello"
foo="${foo} World"
echo "${foo}"
> Hello World

In general to concatenate two variables you can just write them one after another:

(通常，要串联两个变量，可以一个接一个地写它们：)

a='Hello'
b='World'
c="${a} ${b}"
echo "${c}"
> Hello World