Adding Google adsense code to themeheader on Kloe childs theme

Dear Seventhqueen,

I would like to connect my site to the google adsense program, so I want to add the code to themeheader of the kleo child’s theme, because it might goes off if I add it to the Kleo parent theme when ever I update my theme.

Kindly guide me on how to create the themeheader header.php on the child’s theme so I can add the google adsense code.