For absolute beginners, you may be puzzled by the lack of some basic string operations like left, mid and right so here there are if Google is your friend you would have found them email hidden; JavaScript is required/msg03040.html" target="_blank" rel="nofollow">here:
left: func [s [string!] n [integer!]] [copy/part s n]
right: func [s [string!] n [integer!]] [copy/part at s (length? s) - n + 1 n]
mid: func [s [string!] i [integer!] n [integer!]] [copy/part at s i n]
rest-of-string: func [s [string!] n [integer!]] [right s (length? s) - (n - 1)]
















RIGHT function can be wrote more simply like this :
right: func [s [string!] n [integer!]] [copy at tail s negate n]
Thanks DocKimbel, I have added hyperlinks to your comment for tail and negate functions. Color not very readable, will have to change that as soon as possible.