How to call a function in shell Scripting?

Question

I have a shell script which conditionally calls a function.

For Example:-

if [ \"$choice\" = \"true\" ]
then 
  process_install
elif [ \"$choice\" =          


        

Answer 1

The functions need to be defined before being used. There is no mechanism is sh to pre-declare functions, but a common technique is to do something like:

main() {
  case "$choice" in
    true)  process_install;;
    false) process_exit;;
  esac
}

process_install()
{
  commands...
  commands...
}

process_exit()
{
  commands...
  commands...
}

main()