how to change tab to 4 spaces in vim code example

Example 1: vim replace tabs with spaces

" Vi:

" To replace tabs with spaces whilst typing
set tabstop=4 shiftwidth=4 expandtab

Example 2: linux vim set tab to 4 spaces

set tabstop=4

Example 3: linux vim set tab to 4 spaces

set ts=4 sw=4

Example 4: linux vim set tab to 4 spaces

syntax enable