2.4.2 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 size q of the string s
begining at the character of 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"