What is the difference between call by value and call by reference in C?
C Programming Language > Pointer in C Language > Call by Reference in C
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Answer:
Following are the differences between a call by value and call by reference are:
| Call by value | Call by reference | |
|---|---|---|
| Description | When a copy of the value is passed to the function, then the original value is not modified. | When a copy of the value is passed to the function, then the original value is modified. |
| Memory location | Actual arguments and formal arguments are created in separate memory locations. | Actual arguments and formal arguments are created in the same memory location. |
| Safety | In this case, actual arguments remain safe as they cannot be modified. | In this case, actual arguments are not reliable, as they are modified. |
| Arguments | The copies of the actual arguments are passed to the formal arguments. | The addresses of actual arguments are passed to their respective formal arguments. |
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