What does the = symbol of the vim configuration file mean

  question, vim

In vimrc, configure vim’s environment variables with the following statement

set runtimepath^=~/.vim/bundle/DrawIt/

Excuse me^=What does the symbol mean

The vim manual says:help :set^=Can view

If the option to set is a number, it is multiplied by the value after =.

If the option is a string, the string is preceded by a value

If the option is a comma-separated list, commas will also be added automatically.