return code of previous command bash code example

Example 1: bash use argument from previous command

!^      first argument
!$      last argument
!*      all arguments
!:2     second argument

!:2-3   second to third arguments
!:2-$   second to last arguments
!:2*    second to last arguments
!:2-    second to next to last arguments

!:0     the command
!!      repeat the previous line

Example 2: store result of command in variable bash

variable=$(command [option…] argument1 arguments2 …)