Computer Applications
Differentiate between CALL by reference and CALL by value.
User Defined Methods
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Answer
| Call by value | Call by reference |
|---|---|
| Actual parameters are copied to formal parameters. | Formal parameters refer to actual parameters. |
| Any changes to formal parameters are not reflected onto the actual parameters. | The changes to formal parameters are reflected onto the actual parameters. |
| All primitive data types are passed using Call by value. | All reference data types like arrays and objects of classes are passed using Call by reference. |
| It is used to keep original data secure and unchanged. | It is used when the original data values need to be modified. |
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