5.4.5 First character, middle and end of a string: head mid tail
-
head(s) returns the first character of the string s.
Input:
head("Hello")
Output:
"H"
- mid(s,p,q) returns the part of the string
s of size q beginning with the character at index p.
Remember that the first index is 0 in Xcas mode.
Input:
mid("Hello",1,3)
Output:
"ell"
- tail(s) returns the string s without its first character.
Input:
tail("Hello")
Output:
"ello"