you will not find these functions in mikro basic. mikro basic is a little bit C-ish.
There is no print, no input, no inkey$ ...
But there are other functions instead.
copy from help:
str_cut_left
Prototype sub procedure str_cut_left(dim byref S1 as string, dim n as word)
Returns Nothing
Description This routine crops the input string S1 to the left starting from the position n.
Example string_ = "mikroE"
str_cut_left(string_, 2) ' string will be "kroE"
str_cut_right
Prototype sub procedure str_cut_right(dim byref S1 as string, dim n as word)
Returns Nothing
Description This routine crops the input string S1 to the right starting from the position n.
Example string_ = "mikroE"
str_cut_right(string_, 3) ' string will be "mik"
str_split
Prototype sub procedure str_split(dim byref S1, S2 as string, dim n as word)
Returns Nothing
Description This routine splits the input string S1 into two strings, S1 and S2, starting from the position n. If the string S2 is not long enough to hold the splitting part, behavior is undefined.
Example string1 = "MikroElektronika"
str_split(string1, string2, 5) ' after the split, string1 will be "Mikro" and string2 "Elektronika"