stroke no relation backslash
The slash is the oblique slanting line punctuation mark /. Also known as a stroke, a solidus, a forward slash or several other historical or technical names including oblique and virgule. Once used to mark periods and commas, the slash is now used to represent division and fractions,  exclusive 'or' and inclusive 'or', and as a date separator. 
A slash in the reverse direction \ is known as a backslash.
no relation