100 RANDOMIZE
110 REM create two strings
120 LET S$="Hello":LET T$="Bob"
130 REM choose any random character
140 LET C=(RND(127)+32)
150 REM add the character to the string
160 LET S$=S$&CHR$(C)
170 REM check if the string is empty
180 IF S$="" THEN PRINT "String is empty"
190 REM compare two strings
200 IF S$=T$ THEN PRINT "Strings are the same."
210 REM print characters 2 to 4 of a string (a substring)
220 PRINT S$(2:4)