Defference between pass byVal and ByRef

ByVal : Indicates that the argument is passed by value.

ByRef : Indicates that the argument is passed by reference.

While passing the value using by reference then, if anything (value) is changed, it’s effected to original value.

While passing the value using by valuee then, if anything (value) is changed, it’s not effected to original value it’s only changed in that particular place.