If the string filename names an existing file, the try-load procedure reads Scheme source code expressions and definitions from the file and evaluates them sequentially and returns
#t. If not, try-load returns
#f. The try-load procedure does not affect the values returned by
Alias for eval.
Returns the result of reading an expression from str and evaluating it.
eval-stringdoes not change
Reads and evaluates all the expressions from str. As with
load, the value returned is unspecified.
load-stringdoes not change