Methods passing values c#

Question

What makes passing by value and reference different.. it seems like the same concept to me.. please help

Answer 1

Passing by value :
The variable is given to the method. The method cannot change the value.

Passing by reference :
The variable is given to the method and can be changed by the method

https://code.sololearn.com/cq2e7YyYbh87/?ref=app