Question

What is the difference B/W call-by-value and call-by-name ?

Answer 1

Call-by-value evaluates the arguments to a function exactly once. Call-by-name evaluates the arguments to a function, zero, once, or more times. Call-by-need evaluates the arguments to a function zero or once, but not more than once.

For Better Understanding

Ref :http://homepages.inf.ed.ac.uk/stg/NOTES/node72.html

Comments

Your statements are correct- but they are not the main points. In call-by-value- evaluation takes place and the copy of the argument is passed. In call-by-name - the string representation of the parameter is passed- works like a macro expansion in C.