bash script assign output to a variable fail

Question

OS:Yocto

I want to assign the shell output to a variable,

but get the error "test.sh: line 3: out: command not found".

How to do that ...?

this is my code:

#!/bin/bash

out = "$(ls /dev/ | grep "tty" | wc -l)"
echo"$out"

I tried this: How to set a variable to the output from a command in Bash?

Answer 1

Whitespace matters.

#!/bin/bash

out="$(ls /dev/ | grep "tty" | wc -l)"
echo "$out"

Answer 2

when you assign value to variable don't keep Whitespace before and after "=" that makes error in bash

#!/bin/bash

out="$(ls /dev/ | grep "tty" | wc -l)"
echo"$out"

Answer 3

尝试围绕=条带空间，即out="$(ls /dev/ | grep "tty" | wc -l)"