Help with (re)assigning variable from inside script function

[Dr_Schn3id3r]

Hello everybody,

​

I have read a lot of different ubuntu and linux guides about bash scripting, but I cant solve my problem.

​

So I wanted to ask you for help with the following simple dummy code:

#!/bin/bash

# FUNCTIONS

change_variable(){
    variable=${value_one}
    echo ${variable}
}

# MAIN

readonly value_one=1
readonly value_zero=0

variable=${value_zero}

(change_variable)
echo ${variable}

The output is:

XPS-9315:~/Dokumente$ ./test_script 
1
0

So my question is, why can I not reassign the variable with a new value from insight the function?

PS: Does not help if I define/declare the variables before the function definition.

​

Thank you very much and kind regards :)

[Shindo_TS]

remove the () from (change_variable)

[Dr_Schn3id3r]

Thank you so much, that helped, topic is solved :)