Example

 $ A = 5
 $ B = F$STRING(-2 + A)
 $ SHOW SYMBOL B
   B = "3"

     The F$STRING function in this example converts the result of
     the integer expression (-2 + A) to the numeric string, "3".
     First, the F$STRING function evaluates the expression (-2
     + A). Note that 5, the value of symbol A, is automatically
     substituted when the integer expression is evaluated.

     After the integer expression is evaluated, the F$STRING
     function converts the resulting integer, 3, to the string "3".
     This string is assigned to the symbol B.