Special care is necessary when using strings. In order to avoid unexpected results, either a $ has to be prefixed whenever a string variable is set, or the string has to be given in quotes. Possible forms are
$name=string
name='string'
name=string variable
$name=string variable
Examples:
string1='This is a string' !define a string variable. Text in quotes is not
! converted to upper case.
string2=string1 !assign string variable string1 to a new variable.
$string3=string1 !equivalent to previous case.
$string4=mystring !define a string variable. Since ''mystring'' is not
!given in quotes, !it will be converted to upper case.
string5=mystring !string5 will not be a string variable since $ is missing.
yields
SETTING STRING1 = This is a string SETTING STRING2 = This is a string SETTING STRING3 = This is a string SETTING STRING4 = MYSTRING VARIABLE MYSTRING UNDEFINED, ASSUMING 0 SETTING STRING5 = 0.00000000
For more information concerning strings and string variables, see section 8.3