The Shift( s, shift ) command shifts the characters in a string s by the amount given by shift. The value of shift can be positive, negative, or zero. If the value of shift is zero modulo $256$, the original string is returned unchanged.

All of the StringTools package commands treat strings as (null-terminated) sequences of $8$-bit (ASCII) characters.  Thus, there is no support for multibyte character encodings, such as unicode encodings.

$\mathrm{with}\left(\mathrm{StringTools}\right)\:$

$\mathrm{Shift}\left(''abcde''\,2\right)$

$''cdefg''$

$\mathrm{Shift}\left(''abcde''\,258\right)$

$''cdefg''$

$\mathrm{Shift}\left(''abcde''\,-2\right)$

$''\_`abc''$

$\mathrm{Shift}\left(''abcde''\,0\right)$

$''abcde''$

$\mathrm{seq}\left(\mathrm{Shift}\left(''abcde''\,i\right)\,i=-5..5\right)$

$''\backslash ]^\_`'','']^\_`a'',''^\_`ab'',''\_`abc'',''`abcd'',''abcde'',''bcdef'',''cdefg'',''defgh'',''efghi'',''fghij''$