Redirect the specific homepage from http to https

I want to redirect 1 page, example.com to https://example.com
(only 1 page not all pages)

Which should be added in .htacess?

Redirect example.com https://example.com
Redirect http://example.com https://example.com
Redirect http://www.example.com https://example.com
Redirect www.example.com https://example.com

in .htacess

# START WordPress

RewriteEngine On
RewriteBase /
RewriteRule ^ index  .php $ - [L]
RewriteCond% {REQUEST_FILENAME}! -F
RewriteCond% {REQUEST_FILENAME}! -D
RewriteRule. /index.php [L]