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pass by value: when a parameter is passed by value, a new copy of the parameter is created. This new copy is passed to the method that is being called. when the method returns, this copy is destroyed. Any changes made to this new copy doesn't reflect back on the copy of the caller method.
- morpheus February 12, 2009pass by reference: when a parameter is passed by reference, address or pointer of the parameter is passed on to the method being called. So there is only one copy of the parameter. Any changes made to the parameter by the calleed method, will modify this single copy of the parameter. So when called method terminates, the caller method will see the modified copy of the parameter.