how to get string in minecraft code example

Example 1: javascript get last character in string

var hello = "Hello World";
var lastCharOfHello=hello.slice(-1);//d

Example 2: how do i convert a list to a string in python

lines2 = " ".join(lines) 	# Converts the list to a string.
							# This should work for writing to a file
file.write(lines2)

Example 3: make string

public string MyString = "Hello World";